text stringlengths 257 42.9k | id stringlengths 47 47 | metadata dict |
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Science Fair Project Encyclopedia
The chloride ion is formed when the element chlorine picks up one electron to form the anion (negatively charged ion) Cl−. The salts of hydrochloric acid HCl contain chloride ions and are also called chlorides. An example is table salt, which is sodium chloride with the chemical formul... | <urn:uuid:4e76b8fd-c479-45d7-8ee7-faf61495aecb> | {
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Evidence from caves in Siberia indicates that a global temperature increase of 1.5° Celsius may cause substantial thawing of a large tract of permanently frozen soil in Siberia. The thawing of this soil, known as permafrost, could have serious consequences for further changes in the climate.
Permafrost regions cover 24... | <urn:uuid:867e4ca7-5a93-4c6d-b021-8088aa153645> | {
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Far north within the Arctic Circle off the northern coast of Norway lies a small chain of islands known as Svalbard. These craggy islands have been scoured into shape by ice and sea. The effect of glacial activity can be seen in this image of the northern tip of the island of Spitsbergen. Here, glaciers have carved out... | <urn:uuid:16ea6476-5c8b-4b53-82e8-132f1d1b3ac1> | {
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5th Grade Oral Language Resources
Students will:• Learn about the concept of whales.
• Access prior knowledge and build background about whales.
• Explore and apply the concept of whales.
Students will:• Demonstrate an understanding of the concept of whales.
• Orally use words that describe different types of whales an... | <urn:uuid:a16eb0ef-5e43-45e5-b0fb-052d92b4dd25> | {
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A tsunami is a series of waves most commonly caused by violent movement of the sea floor. In some ways, it resembles the ripples radiating outward from the spot where stone has been thrown into the water, but a tsunami can occur on an enormous scale. Tsunamis are generated by any large, impulsive displacement of the se... | <urn:uuid:87a817df-e201-474d-b964-dcde3f8d1a17> | {
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Learn something new every day More Info... by email
A predicate is part of a sentence or clause in English and is one of two primary components that serves to effectively complete the sentence. Sentences consist of two main components: subjects and predicates. Subjects are the primary “thing” in a sentence which the re... | <urn:uuid:b6182938-d2ed-4d47-a28c-9ae9952dbc8d> | {
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Prefixes, Suffixes, Inflectional Endings, and Root Words
Spelling Words Correctly Using Prefixes This strategy will focus on the prefix "re-" to help predict the meaning of words. The same strategy can be used to introduce other common prefixes such as "dis-", "in-" and "im-".
Prefixes and Suffixes Students will create... | <urn:uuid:facadd23-cb41-43f7-ae40-908f685d2f5d> | {
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Say it with FEELING!!
Rationale: “Fluency means reading faster, smoother, more expressively, or more quietly with the goal of reading silently. Fluent reading approaches the speed of speech.” (Murray) At this development stage, fluency is a major goal of the student and the teacher. This lesson is aimed to teach and em... | <urn:uuid:6bb0bc1f-3587-407e-bca0-a705fa87ab31> | {
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What is the media? What does it do? Students examine the types and roles of the media by taking on the role of newsmaker and agenda setter.
Students will be able to:
ANTICIPATE by asking students if they’ve ever seen a television newscast. Ask students to recall any details they remember (graphics, music, story topics)... | <urn:uuid:0ed2aa07-2935-4e0f-8814-0064087833ed> | {
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You must be familiar with slope-intercept form (y = mx + b), and understand which numbers in the equation are m and b, and how to graph them. Mark b on the graph, then graph the slope (m) from that point.
Inequalities are very similar, with only a few differences:
- It's not a line of solutions as in a linear equation;... | <urn:uuid:99cd87c4-0e1d-4f9e-bac3-a2dfe605710e> | {
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Delegates (C# Programming Guide)
A delegate is a type that defines a method signature. When you instantiate a delegate, you can associate its instance with any method with a compatible signature. You can invoke (or call) the method through the delegate instance.
Delegates are used to pass methods as arguments to other ... | <urn:uuid:0d00acab-afd5-4a68-acaf-f8e47e41ba68> | {
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The people in south Asia had no warning of the next disaster rushing toward them the morning of December 26, 2004. One of the strongest earthquakes in the past 100 years had just destroyed villages on the island of Sumatra in the Indian Ocean, leaving many people injured. But the worst was yet to come—and very soon. Fo... | <urn:uuid:db2613b9-457b-405c-a9e8-cf6b3053cdc7> | {
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Simple Equations Introduction to basic algebraic equations of the form Ax=B
⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtitles.
- Let's say we have the equation seven times x is equal to fourteen.
- Now b... | <urn:uuid:0fd4521c-d6c5-4976-a39e-6b54d6f49c8b> | {
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Plot Cartesian Coordinate Points on a Cartesian Graph
When math folks talk about using a graph, they’re usually referring to a Cartesian graph (also called the Cartesian coordinate system). The below figure shows an example of a Cartesian graph.
A Cartesian graph is really just two number lines that cross at 0. These n... | <urn:uuid:c1e14675-b4dd-4400-86a2-d7b112a80ca0> | {
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Lesson Plans for Secondary School Educators
Unit Nine: "The Quest Is Achieved"
Content Focus: The Lord of the Rings, Book Six
Thematic Focus: What Makes a Hero?
As befits its vast scope and extraordinary ambition, The Lord of the Rings boasts three major heroes Frodo, Aragorn, and Sam plus many secondary characters who... | <urn:uuid:7af404ca-9f80-49e7-bbe2-8fb45cc6b37f> | {
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The OSI (Open Systems Interconnection) model was created by the ISO to help standardize communication between computer systems. It divides communications into seven different layers, which each include multiple hardware standards, protocols, or other types of services.
The seven layers of the OSI model include:
- The P... | <urn:uuid:e9e52982-c813-439c-a5e0-27e4bd873e1f> | {
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On this day in 1784, at the Maryland State House in Annapolis, the Continental Congress ratifies the Treaty of Paris. The document, negotiated in part by future President John Adams, contained terms for ending the Revolutionary War and established the United States as a sovereign nation. The treaty outlined America's f... | <urn:uuid:36552e09-fe5f-4bef-9dfd-1854d6c21494> | {
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The process that breaks up and carries away the rocks and soils that make up the Earth’s surface is called erosion. It is caused by flowing water, waves, glaciers, and the wind, and it constantly changes the shape of the landscape. Erosion happens more quickly on bare rock, which is unprotected by soil. It often begins... | <urn:uuid:2a1f1ec2-d89c-4314-8793-def0d577120a> | {
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Removal Act of 1830
On May 26, 1830, the Indian Removal Act of 1830 was passed by the
Twenty-First Congress of the United states of America. After four months of strong debate,
Andrew Jackson signed the bill into law. Land greed was a big reason for the federal
government's position on Indian removal. This desire for I... | <urn:uuid:41b5e72b-2514-42e7-a11a-f03dff83d033> | {
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In the 1950s a mountain range was discovered beneath the ice in Antarctica. The mountains were named the Gamburtsevs. Recently, scientists used ice-penetrating radar and a network of seismometers (size-ma-me-ters) to determine the size and shape of the range. Scientists have learned that the mountains are similar in si... | <urn:uuid:b35bb68e-9555-482d-a9d7-97804d073578> | {
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Hearing When we hear, we are processing sound waves that are made up of compressions of air or water. We hear vibrations in the air as they strike a part of the ear called the eardrum and make it vibrate. These vibrations are sent through other parts of the ear and finally sent as action potentials to the brain. Sound ... | <urn:uuid:3d78a71f-ce98-4f3a-96af-5c80c2d24ece> | {
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Reading to Learn: Comprehension Strategies
Rationale: In order to gain insight while reading one must be able to comprehend. However, students often fail to comprehend (and remember) what they have read. Because of this, teachers have been given comprehension strategies that can be taught to children in order to give t... | <urn:uuid:789d8f86-efd0-46c3-8fbc-207927d4b34d> | {
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Conjunction Activities for Children
This game is great for teaching proper usage of conjunctions. Simply click on the above highlighted link and it will take you to an online crossword puzzle that your students can use. Or, if you would like to make this an in-the-class activity, simply print it off and make copies for... | <urn:uuid:e50c95cc-1336-486a-afbd-c41eae3ecbe2> | {
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The first spacecraft to globally map the Moon left lunar orbit on May 3, 1994. Clementine, a joint Department of Defense-NASA mission, had systematically mapped the Moon’s surface over 71 days, collecting almost 2 million images. For the first time, scientists could put results of the Apollo lunar sample studies into a... | <urn:uuid:4fe5b8e2-7290-471b-8acf-b124c73b69e8> | {
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The first African-American Member of Congress was elected nearly 100 years after the United States became a nation. Slavery had only been illegal for five years in the American South when Representative Joseph Rainey of South Carolina and Senator Hiram Revels of Mississippi were elected to office in 1870. In fact, the ... | <urn:uuid:f164a12e-ab7b-4389-b2b8-cf71d8af82ec> | {
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As discussed in the previous part of Lesson 3, the slope of a position vs. time graph reveals pertinent information about an object's velocity. For example, a small slope means a small velocity; a negative slope means a negative velocity; a constant slope (straight line) means a constant velocity; a changing slope (cur... | <urn:uuid:190d46fc-ec5a-4a56-bf20-de156a9a8b7e> | {
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In the last chapter, we graphed data. Now, we move to graphing equations with two variables. For simplicity, the discussion in this chapter is confined to linear equations, i.e. equations of degree 1 . Some of the general concepts carry over to more general equations, to be discussed later.
The first section explains h... | <urn:uuid:b30e9486-7bf7-482e-bcc1-ef5338d350ff> | {
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The space near black holes is one of the most extreme environments in the Universe. The bodies' strong gravity and rotation combine to create rapidly spinning disks of matter that can emit huge amounts of light at very high energies. However, the exact mechanism by which this light is produced is uncertain, largely bec... | <urn:uuid:4dae9433-ebe8-4619-93f0-131eff1d85e3> | {
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These are not simply facts to be memorized. These are complex concepts that students need to develop through engagement with the natural world, through drawing on their previous experiences and existing knowledge, and through the use of models and representations as thinking tools. Students should practice using these ... | <urn:uuid:fadc6390-0f6e-41cd-9828-b559fa891762> | {
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In late 1863, President Abraham Lincoln and the Congress began to consider the question of how the Union would be reunited if the North won the Civil War. In December President Lincoln proposed a reconstruction program that would allow Confederate states to establish new state governments after 10 percent of their male... | <urn:uuid:565f7940-3eef-44f3-92bc-f853e45123b8> | {
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The Seasonal Merry-Go-RoundThe tilt of Earth's rotational axis and the Earth's orbit around the Sun work together to create the seasons. As the Earth travels around the Sun, it remains tipped over in the same direction, with its north pole pointed towards the star Polaris. This 23.5 degree tilt of the Earth's rotationa... | <urn:uuid:780a438e-7705-49d9-b5e2-0ad96cc083c4> | {
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If students are not familiar with or have not recently practiced plotting points on the first quadrant using ordered pairs, review that concept before continuing.
Distribute the Coordinate Geometry sheet (M-5-3-3_Coordinate Geometry and KEY.docx) to each student. On a copy of the First Quadrant worksheet from Lesson 2 ... | <urn:uuid:306213f8-dc13-43ed-acd7-8e9eff54557b> | {
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Conditional statements make appearances everywhere. In mathematics or elsewhere, it doesn’t take long to run into something of the form “If P then Q.” Conditional statements are indeed important. What are also important are statements that are related to this conditional statement by changing the position of P, Q and t... | <urn:uuid:017f3d83-aeac-4e28-af5a-1be3c01c4af1> | {
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This is a free lesson from our course in Algebra I
In this lesson you learn how to solve linearinequalities and also graph them. An inequality is an algebraic expression with one of these signs:
<, >, <=, >=. For example 2x + 3y >= 5. A
solution of an inequality is a number which when substituted for the variable makes... | <urn:uuid:aa600e3b-1174-4217-89cf-8f61147cdcf8> | {
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The Norwegian Fjords are steep, ice-carved valleys that stretch from the land out into the sea. Fjords are created not solely by glacier erosion, but also by the high-pressure melt water that flows beneath the ice. Fjord valleys can be carved hundreds to thousands of meters below sea level. The Hardangerfjorden shown i... | <urn:uuid:5c3c43bf-ba8c-47a1-add1-fd5edd04f872> | {
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- To comprehend and respond to books read aloud
- To understand the concept of characters
- To respond to questions
- To use expressive language
- To recall and retell parts of a selection
- To build vocabulary
Read Corduroy by Don Freeman, or another book with interesting characters.
Tell children that people, animals... | <urn:uuid:63a7dc8f-b306-4f36-98dc-63eeb7cb632f> | {
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Solve equations that require two operations to isolate the variable.
A list of student-submitted discussion questions for Two-Step Equations and Properties of Equality.
To encourage students’ critical thinking about vocabulary concepts, to allow students to reflect on their knowledge of individual vocabulary words, and... | <urn:uuid:1520608b-d2cb-431c-b8f0-3c190ba29299> | {
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Before defining the surface area, I want to start from the bottom of this concept. Kids start to learn about points in grade five or six. Points can be compared to real numbers. For example, the dot we use to mark the period (full stop ".") is a point. A point can be represented by a capital letter. Following are two p... | <urn:uuid:113371ba-5086-4688-adbd-4967d43cb801> | {
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Learning About Simple Sentences
This is an introductory lesson about simple sentences.
• to introduce the concept of simple sentences;
to review the sentence parts, subject and predicate;
to reinforce the idea that sentences make a complete thought.
You have learned that a sentence is a group of words that makes comple... | <urn:uuid:7aa8e58a-8d09-47c0-9850-f5f469d24e97> | {
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Geometry for Elementary School/Pythagorean theorem
In this chapter, we will discuss the Pythagorean theorem. It is used the find the side lengths of right triangles. It says:
- In any right triangle, the area of the square whose side is the hypotenuse (the side of a right triangle opposite the right angle) is equal to ... | <urn:uuid:884ee432-952c-45ed-9f75-3c341c5a7243> | {
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Introduction to Rational Functions - Concept
Once we have a thorough understanding of polynomials we can look at rational functions that are a quotient of two polynomials. These rational functions have certain behaviors, and students are often asked to find their limits, or to graph them. Their graphs can have differen... | <urn:uuid:e63eb18a-d588-4324-a440-b84c1f734997> | {
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Although the surface is cold, the base of an ice sheet is generally warmer due to geothermal heat. In places, melting occurs and the melt-water lubricates the ice sheet so that it flows more rapidly. This process produces fast-flowing channels in the ice sheet — these are ice streams.
The present-day polar ice sheets a... | <urn:uuid:cef22dac-20e3-409a-98b3-f2f3ab7520bd> | {
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Rationale: Children need alphabetic insight about letters and phonemes to help them with reading skills. Before children can understand that letters and phonemes match, they have to be able to hear phonemes in spoken words. This lesson will help children hear that p says /p/. They will learn to hear /p/ in spoken words... | <urn:uuid:77883ea2-e077-4704-a54f-171e160570dc> | {
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Students will learn how to graph motion vs time. Students will learn how to take the slope of a graph and relate it to the instantaneous velocity or acceleration for position or velocity graphs. Finally students will learn how to take the area of a velocity vs time graph in order to calculate the displacement.
Illustra... | <urn:uuid:a686f5c2-ea3e-4779-97ab-33662faf6f84> | {
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This is a drawing of a process which forms mountains on Earth.
Click on image for full size
Mountains are built through a general process called "deformation" of the crust of the Earth. Deformation is a fancy word which could also mean "folding". An example of this kind of folding comes from the process described below... | <urn:uuid:f82c143a-c60e-48df-9382-f61afd0bed05> | {
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Why did the US Congress have a problem in 1850? And why did the solution lead to the creation, 160 years ago this month, of a place called Utah?
The lands of the American Southwest – an area now covering California, Wyoming, Colorado, New Mexico, Arizona, Nevada, and Utah – were ceded to the United States following the... | <urn:uuid:238bd93e-8032-42fd-8c19-309c1f169b2a> | {
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Solon was one of the archons in ancient Athens. In 594 B.C. Solon made
several important reforms, which loosened the tension of civil war breaking
out. He also made it were the public office system was based on wealth. Thus
making it were any qualified citizen could become a public official.Solon also
published all the... | <urn:uuid:0ac409c0-aa17-435b-a64f-752c973331a4> | {
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Algebraic concepts can evolve and continue to develop during prekindergarten through grade 2. They will be manifested through work with classification, patterns and relations, operations with whole numbers, explorations of function, and step-by-step processes. Although the concepts discussed in this Standard are algebr... | <urn:uuid:a28028aa-a1b8-404e-ae45-a6c966b32e12> | {
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A < B A > B A <= B A >= B A == B A ~= B
The relational operators are <, >, <=, >=, ==, and ~=. Relational operators perform element-by-element comparisons between two arrays. They return a logical array of the same size, with elements set to logical 1 (true) where the relation is true, and elements set to logical 0 (fa... | <urn:uuid:53033633-cf29-4491-9e11-b0f4af8e5a0c> | {
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What a scale actually means and what we can do with it depends on what its numbers represent. Numbers can be grouped into 4 types or levels: nominal, ordinal, interval, and ratio. Nominal is the most simple, and ratio the most sophisticated. Each level possesses the characteristics of the preceding level, plus an addit... | <urn:uuid:1b5317b0-c1e4-4fac-8deb-315c116de056> | {
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Lesson 17 Section 2
Example 1. 5 is to 15 as 8 is to 24.
That is a proportion because 5 is the third part of 15, just as 8 is the third part of 24. (Lesson 15.)
A proportion involves four numbers -- four terms. To explain why they are proportional we start with the first term and state its ratio to the second; then we ... | <urn:uuid:54d45889-363f-416d-98ed-2cb7bbbc84ef> | {
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The process of starting a computer system is known as bootstrapping. In most systems, the initial bootstrap sequence begins with code in ROM, which the CPU executes. The ROM code only contains a first step—it merely loads an image into the computer's RAM and branches to the image. There are two approaches used to obtai... | <urn:uuid:7d778592-9e92-47a9-a9a4-ba1090f9c271> | {
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Vermont Votes for Kids: A project of the Vermont Secretary of State
Curriculum, Teacher Materials for Lesson 1:
Fairness and Diversity with One Vote
Engaging students in discussions about voting is an excellent way to help them move from shallow to deep thinking, and to demonstrate the higher order thinking skills of a... | <urn:uuid:6dceeff3-c7d6-41e9-bbba-38495fc3bab3> | {
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A problem asks for something. This request often follows words such as how, when, where, show and find. What is asked for is frequently followed by a question mark.
The response to the request is commonly in the problem statement.
The starting equation then will make a request.
The response to the request by the equati... | <urn:uuid:670bf863-5469-4138-8119-ed777596f201> | {
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Lesson 2: Programming and Movement
Lesson 2: Programming and Movement
After students have completed their robots it is time to put them into action. Now is a good time to talk to your students about how robots work. Ask them abstract questions like "Will a robot always do what we tell them to?" The answer to that quest... | <urn:uuid:aefa8249-3b8f-4424-9103-2465f2845e7d> | {
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The Online Teacher Resource
Receive free lesson plans, printables, and worksheets by email:
- Over 20,000 Printables
- For All Grade Levels
- A Complete Elementary Curriculum
- Print and go!
Kindergarten through Grade 2 (Primary / Elementary School)
Overview and Purpose:
This activity will help students see the logic o... | <urn:uuid:c5c09c53-896e-457f-bed5-7e47f25356dd> | {
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Defining Implicit Bias
Also known as implicit social cognition, implicit bias refers to the attitudes or stereotypes that affect our understanding, actions, and decisions in an unconscious manner. These biases, which encompass both favorable and unfavorable assessments, are activated involuntarily and without an indivi... | <urn:uuid:5d89be7f-5773-4e0b-b487-f1d5293e056b> | {
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A while ago we looked at some basics in Heat Transfer Basics – Part Zero.
Equations aren’t popular but a few were included.
As a recap, there are three main mechanisms of heat transfer:
In the climate system, conduction is generally negligible because gases and liquids like water don’t conduct heat well at all. (See no... | <urn:uuid:7bc04b13-f3c5-4f89-a5f9-07e822a982d0> | {
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This lesson will help students identify how to make good decisions which will help them financially in the future. Students will identify how to take their own wants and work them into a form of a personal budget. Students will also discuss various financial scenarios and decide what course of action would be the best ... | <urn:uuid:e3950ee9-bc21-4057-80a7-697cb4993a7d> | {
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EDSITEment, from the National Endowment for the Humanities, is a partnership with the National Trust for the Humanities and the Verizon Foundation, and brings online humanities resources directly to the classroom through exemplary lesson plans and student activities. For teachers of U.S. history and American government... | <urn:uuid:c30d4660-1adc-4f3c-be7f-40f76d5a8e78> | {
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The galaxies of the Universe's youth worked busily at making stars—that much is certain. However, what did those galaxies look like? How many were there, and how were they distributed in space and time?
Over such huge distances, those galaxies appear faint to us, so it's only within the last decade or so that astronome... | <urn:uuid:4db1da1a-6ac4-4c0c-aa54-41f13a51dda9> | {
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Darwin was proposed as a constellation of four or five free-flying spacecraft designed to search for Earth-like planets around other stars and analyse their atmospheres for chemical signatures of life.
The constellation was proposed to carry out high-resolution imaging using aperture synthesis in order to provide pictu... | <urn:uuid:11019255-c962-44ae-a822-53aacef06707> | {
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So, let's start of with some basic strings and print statements. If you want Python to print something, you just type this into a python interactive shell:
print 'message goes here'
When you use print, you are passing it a string between the ' '. This string is then printed underneath the command. But what if you want ... | <urn:uuid:fb2b6f44-59f2-4ee2-adc3-95c494080d49> | {
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In the ancient past temperatures on Earth appeared to have been much warmer than today. It is possible that temperatures may rise as high as then based on current climate change projections. The new study, by National Center for Atmospheric Research (NCAR) scientist Jeffrey Kiehl, will appear as a Perspectives piece in... | <urn:uuid:8332ee20-3132-415c-a068-1c25934e63a0> | {
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Before Activative Prior Knowledge -10 minutes
1. Use Literary Elements of Style, Tone and Mood PowerPoint to review the definition of mood. Do not go through the entire slideshow. You will only need to view the slides pertaining to mood.
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The woman suffrage movement in the United States began in 1848 at the first woman's rights convention, which was held in Seneca Falls, New York, with the participants calling for political equality and the right to vote. As the movement gained more support throughout the country, it also brought about a great deal of p... | <urn:uuid:9d116e46-dbcd-4f8c-9029-0fe88191dbda> | {
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Kinetics Arrhenius Calculator
Nuclear Decay Calculator
Linear Least Squares Regression
Newton's Method Equation Solver
Units Conversion Calculator
Related Information Links
Texas Instruments Calculators
Hewlett Packard Calculators
Chemical nomenclature is the term given to the naming of compounds. Chemists use specific... | <urn:uuid:23c8a64b-b492-4fd7-925c-0ef483b0e90c> | {
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NASA's latest rover on Mars depends on a sandwich of semiconducting material that can turn heat into electricity. In the case of Curiosity, the steady radioactive decay of plutonium 238 warms such thermoelectric material and turns roughly 4 percent of that heat into a steady flow of electrons. A similar radioisotope th... | <urn:uuid:0fb28464-fee7-49e2-bff4-c482f4644406> | {
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As discussed in a previous part of Lesson 4, the shape of a velocity vs. time graph reveals pertinent information about an object's acceleration. For example, if the acceleration is zero, then the velocity-time graph is a horizontal line - having a slope of zero. If the acceleration is positive, then the line is an upw... | <urn:uuid:3142843b-314b-4203-8269-91c4afee5816> | {
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Long before television footage and newspapers show pictures of an erupting volcano spewing mile-high clouds of hot ash and noxious gas into the atmosphere, and long before rivers of lava envelope the landscape, something as equally powerful happens deep below the Earth's surface. A natural occurrence scientists refer t... | <urn:uuid:3b3d435d-98cd-4dcb-b327-1a513523cfd6> | {
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The previous list of Essential Questions
can be downloaded as a pdf here.
A carefully crafted lesson has a well-defined focus and framework as well as a clearly stated purpose. The lesson should present students with an issue that is phrased as a problem to be solved or a thought-provoking question to be analyzed and a... | <urn:uuid:4ba4bf5c-f0a4-4783-8ffc-31fdb9631f85> | {
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Beneath the Earth's Crust
Beneath Earth's crust are the mantle, the outer core, and the inner core. Scientists learn about the inside of Earth by studying how waves from earthquakes travel through Earth.
World Book illustration by Raymond Perlman
Beneath Earth’s crust, extending down about 1,800 miles (2,900 kilometers... | <urn:uuid:e323c08c-bf12-4cd2-bb78-4c1cee2b5c4d> | {
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Scientists using a NASA instrument aboard an Indian spacecraft have discovered signs of water native to the moon — not brought from far away, but water that must have been locked beneath the lunar crust since its birth.
The discovery by the ill-fated Chandrayaan-1 lunar probe represents the first time researchers have ... | <urn:uuid:c43429bb-13d7-4edd-abaf-ff5ddebda189> | {
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Python uses the traditional ASCII character set. The latest version (3.2) also recognizes the Unicode character set. The ASCII character set is a subset of the Unicode character set. An ASCII character can be represented as byte (8 bits). Hence a string made out of ASCII characters can be looked upon as a bytestring.
P... | <urn:uuid:2d494962-cb14-4408-861b-895a9c4031c5> | {
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The abolitionists were divided over strategy and tactics, but they were very active and very visible. Many of them were part of the organized Underground Railroad that flourished between 1830 and 1861. Not all abolitionists favored aiding fugitive slaves, and some believed that money and energy should go to political a... | <urn:uuid:7b763400-f2ac-4e2f-bd37-f1585182b663> | {
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El Niño occurs when easterly trade winds in the tropical Pacific relax – even reverse – to allow a vast pool of warm water piled up in the western tropical Pacific to move east until it reaches the west coast of Central and South America, leading to higher-than-normal sea-surface temperatures across the equatorial Paci... | <urn:uuid:e4182428-c9d2-4511-9be4-04268314d963> | {
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This tutorial will introduce coloring in Graph Theory, including vertex, edge, and face coloring; the Four-Color theorem, and applications of graph coloring.
When dealing with Graph coloring, regardless of the surface (vertex, edge, face), no two colors can be adjacent to each other. While this is fairly simple, graph ... | <urn:uuid:2589cae6-d226-4d6b-a7af-0c0c78a99573> | {
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Melissa Schack, Student at Indiana University of P
Following a lecture on the history of Mexican food, grade five students will be able to recognize and order Mexican cuisine, at a restaurant, with 100% accuracy.
- At least one computer with access to the World Wide Web.
- A set of art supplies for each student.
- Cons... | <urn:uuid:23555539-74ec-41aa-81a5-7407e1428cef> | {
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Many students at this level are using recursive rules to extend the pattern. While this is helpful and easy to use for a small number of cases, it is cumbersome and prone to errors when trying to extend the pattern for larger numbers. Students need to see that it is more helpful to find more generalizable rules to solv... | <urn:uuid:83f4b5d0-ee49-4f02-8658-126a30901059> | {
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“Logic and Set Theory” is designed to offer teachers and children a chance to explore what may be to them a different area of Finite Mathematics. The unit offers an introduction to the basic concepts and symbols of Logic and Set Theory and provides exercises in these two areas. Problem solving in all areas of mathemati... | <urn:uuid:da1d3b2a-cbeb-4bcb-850a-8b83c4ece15d> | {
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In this section of the tutorial, you will learn the diference between statistically independent events and mutually exclusive events, sampling with and without replacement.
Two events are statistically independent if the first event do not affect outcome of the second event and vice versa. But, these two events may hav... | <urn:uuid:ed4f57af-a86e-455b-a9c2-59fb53f651a4> | {
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How to Identify the Four Conic Sections in Graph Form
Each conic section has its own standard form of an equation with x- and y-variables that you can graph on the coordinate plane. You can write the equation of a conic section if you are given key points on the graph. You can alter the shape of each of these graphs in... | <urn:uuid:b6361da2-d327-4d18-bf48-87b8e37f43a6> | {
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This activity is intended to supplement Algebra I, Chapter 9, Lesson 2.
Problem 1 - Introduction to Area of a Rectangle
Run the AREA program (in PRGM) and select the option for Problem 1 (#1).
Enter 6 for .
1. What are the lengths of the sides of the rectangle?
2. What is the area of the rectangle when ?
Now, change th... | <urn:uuid:18a1263e-306f-443d-9e38-0192cbdb9ff0> | {
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Heat Drives the System
Convection currents of magma (molten rock) circulate through Earth's asthenosphere. The plates are carried on these convection currents. As they move, plate material is continually being created and destroyed along the margins.
Where magma squeezes up through cracks between the ocean floor plates... | <urn:uuid:8343ec09-f16e-4060-8718-573d191e6808> | {
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In order to become effective at reading words, students must develop their decoding skills to a seemingly "automatic" level. Readers must be able to recognize words quickly and accurately. In truth, when we read we continue to employ the steps of decoding, but we do so in such a manner that it appears almost effortless... | <urn:uuid:d4168bbf-981d-4e24-9a36-886e516c8e01> | {
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By the end of this lesson I will be able to calculate the rate of change using rise over run of various lines.
What if you were given two points that a line passes through like (-1, 0) and (2, 2)? How could you find the slope of that line? After completing this Concept, you'll be able to find the slope of any line.
Whe... | <urn:uuid:8af0c5af-07a4-423a-9ca4-5d2e013fb804> | {
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The containers are made up of a number of 'buckets', each of which can contain
any number of elements. For example, the following diagram shows an
unordered_set with 7 buckets containing
(this is just for illustration, containers will typically have more buckets).
In order to decide which bucket to place an element in,... | <urn:uuid:4a16cc99-3053-46d7-9454-4e1e0132a7aa> | {
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Here are practice problems and solutions for the areas that are covered on the algebra section of the Compass mathematics test.
Basic Algebraic Calculations with Polynomials
Remember that a polynomial is a mathematical equation that contains more than one variable, such as x or y.
Solution: This type of algebraic expre... | <urn:uuid:60ad6294-eb7e-47bc-b7e5-dfe307483d68> | {
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- slide 1 of 5
Flat versus 3D
The biggest hurdle in figuring out how to teach children about three dimensional shapes is getting them to think beyond the flat surface of a two-dimensional figure. From before children are even in school they are taught the shapes of circles, squares, triangles and rectangles, but much l... | <urn:uuid:9a7e979e-c6de-47be-a9ed-01e845261eda> | {
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3-D Earth Geometry
An interesting topic in 3-dimensional geometry is Earth geometry. The Earth is very close to a sphere (ball) shape, with an average radius of `6371\ "km"`. (It's actually a bit flat at the poles, but only by a small amount).
Earth geometry is a special case of spherical geometry. When we measure dist... | <urn:uuid:052fe0b2-91da-49e6-8fc6-4cf05b356765> | {
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IntroductionYou are at: Basic Concepts - Measurements - IntroductionMeasuring VoltageMeasuring Current
Electrical measurements often come down to either measuring current or measuring voltage. Even if you are measuring frequency, you will be measuring the frequency of a current signal or a voltage signal and you will n... | <urn:uuid:6d1ae0f6-db05-4be1-b550-7777d23fd196> | {
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Draw appropriate inferences and conclusions from text. SPI 0301.5.1
Links verified on 10/20/2011
- Create Test - Create printable tests and worksheets from Grade 3 Making Inferences and Drawing Conclusions questions.
- Drawing conclusions - worksheet
- Drawing Conclusions - test tutor quiz
- Drawing Conclusions - read ... | <urn:uuid:bfe42c23-0af5-4814-9c16-13c9ca27f34d> | {
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Submitted by: Jason T. Bedell
In this environment lesson plan, which is adaptable for grades 6-12, students use BrainPOP resources to develop an understanding of how people impact the natural environment of different regions, as well as how the cultural make-up of a region affects how the people interact with the natur... | <urn:uuid:8eddebfd-b2a7-4a54-8e60-c506dd041a48> | {
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"You are an engineer who wants to build different kinds of bridges. The bridges will be made of colored rods. The first bridge you are to build is a 1-span bridge made with one yellow rod and two red rods." (Build the bridge illustrated below, with the students copying.) "The yellow rod is called a span, and the red ro... | <urn:uuid:04a5d35c-3008-42dc-846d-2ac8ea35f92d> | {
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"languag... |
Scatter plots are similar to line graphs in that they use horizontal and vertical axes to plot data points. However, they have a very specific purpose. Scatter plots show how much one variable is affected by another. The relationship between two variables is called their correlation .
Scatter plots usually consist of a... | <urn:uuid:5efe3d0c-b9b3-4428-870e-04193353efc0> | {
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Arizona implemented new standards for kindergarteners last year.
Here is what students are required to learn now:
--Read and write numbers to 20.
--Count to 100 by ones and 10s.
--Create all combinations for the numbers 0 to 10 - such as 5 = 2 + 3 and 4 + 1 -- using objects or drawings
--Solve addition and subtraction ... | <urn:uuid:180b7153-8c29-4920-8734-914baa2002e2> | {
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In the 1950s
, scientists began to experiment with nuclear rocket propulsion
systems as an alternative to chemical rockets. If interplanetary travel were to ever become practical, a more efficient means would have to be developed. Starting in 1955
, scientists at Lawrence Livermore National Laboratory
experimented with... | <urn:uuid:58a59ee4-94b2-4bc0-906c-e326722a558a> | {
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"language": "en",
"la... |
This activity is intended to supplement Algebra I, Chapter 12, Lesson 6.
Problem 1 – Introduction
Press and enter the two functions
Also, for the second expression, move the cursor to the left of and press ENTER until a circle appears. This will place a large circle in front of the graph as it is graphed on the handhel... | <urn:uuid:3cd36571-d4ae-4199-a26b-48880dea90df> | {
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"url": "http://www.ck12.org/book/Texas-Instruments-Algebra-I-Student-Edition/r1/section/13.2/",
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... |
Suppose that we have an election with three candidates: A, B, and C. On a standard ballot (like those used in most elections around the world) the three candidates would be listed and each voter would have to choose one. While the voter in this situation has only three choices, there are really six possible preferences... | <urn:uuid:37563da8-66cf-4001-8716-50eea881b5af> | {
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"url": "http://www.maa.org/publications/periodicals/loci/joma/three-party-elections-interactive-examples-introduction?device=mobile",
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According to the revised Virginia Standards of Learning for 2009, students in Grade One will explore basic geometry in the form of shapes. They will focus on identifying and tracing, describing, and sorting plane geometric figures (triangle, square, rectangle, and circle) according the number of sides, vertices, and ri... | <urn:uuid:1ef80b61-c524-4e68-bd46-ecb4f2f54666> | {
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"url": "http://blog.richmond.edu/openwidelookinside/archives/1327",
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"language"... |
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