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Mexican America - Introduction
"Mexican America" is a sampling of objects from the collections of the National Museum of American History. The stories behind these objects reflect the history of the Mexican presence in the United States. They illustrate a fundamentally American story about the centuries-old encounter b... | 0.406069 |
Uveitis is inflammation of the uvea, which is made up of the iris, ciliary body and choroid. Together, these form the middle layer of the eye between the retina and the sclera (white of the eye).
The eye is shaped like a tennis ball, with three different layers of tissue surrounding the central gel-filled cavity, which... | 0.764701 |
Marion Levine teaches English, Literature and Film Production at Los Angeles Center for Enriched Studies, Los Angeles, CA
Measure for Measure, Act 4 or 5
What's On for Today and Why
Students will choose a character from Measure for Measure and create a "back story" for that character. This will encourage students to re... | 0.546011 |
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... | 0.880625 |
Fun Classroom Activities
The 20 enjoyable, interactive classroom activities that are included will help your students understand the text in amusing ways. Fun Classroom Activities include group projects, games, critical thinking activities, brainstorming sessions, writing poems, drawing or sketching, and more that will... | 0.473391 |
by I. Peterson
Unlike an ordinary, incandescent bulb, a laser produces light of a single wavelength. Moreover, the emitted light waves are coherent, meaning that all of the energy peaks and troughs are precisely in step.
Now, a team at the Massachusetts Institute of Technology has demonstrated experimentally that a clo... | 0.480218 |
The Solar and Heliospheric Observatory (SOHO) spacecraft is expected to discover its 1,000TH comet this summer.
The SOHO spacecraft is a joint effort between NASA and the European Space Agency. It has accounted for approximately one-half of all comet discoveries with computed orbits in the history of astronomy.
"Before... | 0.369433 |
Teaching Strategies: Effective Discussion Leading
While lecturing is a fast and direct way to communicate a body of knowledge, discussion encourages students to discover solutions for themselves and to develop their critical thinking abilities. They learn how to generate ideas, consider relevant issues, evaluate soluti... | 0.574622 |
The knowledge, skills and understandings relating to students’ writing have been drawn from the Statements of Learning for English (MCEECDYA 2005).
Students are taught to write a variety of forms of writing at school. The three main forms of writing (also called genres or text types) that are taught are narrative writi... | 0.601033 |
Filed under: Foundational Hand
After studying the proportions of the Foundational Hand letters, the next step is to start writing the letters.
Each letter is constructed rather than written. The letters are made up of a combination of pen strokes, which are only made in a top – down or left – right direction. The pen i... | 0.56251 |
In mathematics, hyperbolic functions are analogs of the ordinary trigonometric, or circular, functions. The basic hyperbolic functions are the hyperbolic sine "sinh" (typically pronounced /ˈsɪntʃ/ or /ˈʃaɪn/), and the hyperbolic cosine "cosh" (typically pronounced /ˈkɒʃ/), from which are derived the hyperbolic tangent ... | 0.728602 |
Surface area is a two-dimensional property of a three-dimensional figure. Cones are similar to pyramids, except they have a circular base instead of a polygonal base. Therefore, the surface area of a cone is equal to the sum of the circular base area and the lateral surface area, calculated by multiplying half of the c... | 0.509274 |
In this lecture you will learn how to undertake Solving Quadratic Systems. First you will start with Linear Quadratic Systems as well as their Solutions, before you move into Quadratic Quadratic Systems and their Solutions. Lastly, you will learn how to solve Systems of Quadratic Inequalities.
linear-quadratic system, ... | 0.964791 |
An earthquake is a sudden vibration or trembling in the Earth. More than 150,000 tremors strong enough to be felt by humans occur each year worldwide (see Chance of an Earthquake). Earthquake motion is caused by the quick release of stored potential energy into the kinetic energy of motion. Most earthquakes are produce... | 0.713507 |
In 2006, high sea temperatures caused severe coral bleaching in the Keppell Islands, in the southern part of the reef — the largest coral reef system in the world. The damaged reefs were then covered by a single species of seaweed which threatened to suffocate the coral and cause further loss.
A "lucky combination" of ... | 0.44666 |
During this tutorial you will be asked to perform calculations involving trigonometric functiions. You will need a calulator to proceed.
| The purpose of this tutorial
is to review with you the elementary properties of the trigonometric functions.
Facility with this subject is essential to success in all branches of sc... | 0.937322 |
Is there such a thing as too much money?
by Fred E. Foldvary, Senior EditorWhat is inflation? There are two economic meanings of inflation. The first meaning is monetary inflation, having to do with the money supply. To understand that, we need to understand that the impact of money on the economy depends not just on t... | 0.331602 |
There are many techniques available to help students get started with a
piece of writing. Getting started can be hard for all levels of writers.
Freewriting is one great technique to build fluency. That was
explored in an earlier lesson plan: http://www.thirteen.org/edonline/adulted/lessons/lesson18.html
This unit offe... | 0.700029 |
Chandra "Hears" a Supermassive Black Hole in Perseus
A 53-hour Chandra observation of the central region of the Perseus galaxy cluster (left) has revealed wavelike features (right) that appear to be sound waves. The features were discovered by using a special image-processing technique to bring out subtle changes in br... | 0.427335 |
SL Psychology/Intro to Research Methods
The following items should be included in this section: The Hypothetico-deductive (scientific)method, types of psychological research methods, research designs, sampling, reliability, validity, and triangulation.
Research into mind can be traced back to Ancient Greece. However, e... | 0.460547 |
|U.S. Naval Observatory||Earth Orientation Department|
In 1956, following several years of work, two astronomers at the U. S. Naval Observatory (USNO) and two astronomers at the National Physical Laboratory (Teddington, England) determined the relationship between the frequency of the Cesium atom (the standard of time)... | 0.485667 |
The Savage Islands, or Ilhas Selvagens in Portuguese, are a small archipelago in the eastern North Atlantic Ocean between the archipelago of Madeira to the north and the Canary Islands to the south. Like these other island groups, the Savage Islands are thought to have been produced by volcanism related to a mantle plu... | 0.569822 |
- Hypothermia occurs when the body's core temperature drops below 37°C.
- This typically results from prolonged exposure to cold conditions, especially in damp, wet or snowy weather.
- Early signs: shivering; listlessness; cold, pale, puffy face; impaired speech and impaired judgment.
- Later signs: drowsiness, weaknes... | 0.354843 |
Most common smoke detectors (Fig. 13-2) contain a small amount of 241Am, a radioactive isotope. 241Am is produced and recovered from nuclear reactors. Alpha particles emitted by the decays of 241Am ionize the air (split the air molecules into electrons and positive ions) and generate a small current of electricity that... | 0.80581 |
Lesson Plans and Worksheets
Browse by Subject
Blood Teacher Resources
Find teacher approved Blood educational resource ideas and activities
A series of diagrams and photographs is a vivid tool for delivering a lesson about blood vessels. Each slide has notes for the lecturer to use to explain each slide. Your young bio... | 0.74993 |
Teacher's Resources - A Question of Ritual
For the people of the ancient Americas as for many other humans worldwide, ceremonies formed a bridge between their world and that of deities and spirits. Through sacred rituals they communicated to their gods and ancestors their hopes for a bounty of food, protection from the... | 0.374542 |
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... | 0.481386 |
Storytelling in the Classroom
Storytelling is not the same as reading aloud because it requires greater interaction between the teller and the listener. Therefore, storytelling is a great tool for improving children's communication skills, as well as developing language skills, comprehension, and self-awareness. (Readi... | 0.450481 |
Discussion about a core curriculum brings to light some fundamental differences in thinking about education and learning.
A core curriculum is a set of educational goals that focuses on making sure that all students using it will learn set material tied to age/grade level. The design of the curricula are based on thing... | 0.455852 |
Lamp Shell Terebratulina septentrionalis
It would be easy to mistake a lamp shell for a small bivalve mollusk, as both have a hinged shell in two parts and live attached to the sea floor. Lamp shells, however, have a very thin, light shell and the two parts are different sizes, with the smaller one fitting into the lar... | 0.364075 |
In neuroanatomy, a sulcus (Latin: "furrow", pl. sulci) is a depression or fissure in the surface of the brain.
It surrounds the gyri, creating the characteristic appearance of the brain in humans and other large mammals.
Large furrows (sulci) that divide the brain into lobes are often called fissures. The large furrow ... | 0.492433 |
How to Enter Basic Formulas in Excel 2007
As entries go in Excel 2007, formulas are the real workhorses of the worksheet. If you set up a formula properly, it computes the right answer when you first enter it into a cell. From then on, it keeps itself up to date, recalculating the results whenever you change any of the... | 0.784304 |
Trilobite Olenoides erratus. Source: Mark A.Wilson A fossil is the preserved remain of a lifeform that lived in prehistoric times. Most commonly fossils are mineralized parts or a whole organism which is no longer alive. In other cases the fossil may contain actual remains of the dead organism; in particular, DNA may b... | 0.557012 |
Mars has a striking red appearance, and in its most favorable position for viewing, when it is opposite the sun, it is twice as bright as Sirius, the brightest star. Mars has a diameter of 4,200 mi (6,800 km), just over half the diameter of the earth, and its mass is only 11% of the earth's mass. The planet has a very ... | 0.316602 |
Classification of Nouns
Nouns are categorized by vowels and consonants they include. For the consonants they include nouns are categorized in two groups: 15 Nouns and 16 Nouns. For the vowels they include nouns are categorized in 5 groups: a, ä; å, ø; o, ö; u, y; i, e.
15 Nouns: the first consonant of these nouns are h... | 0.748592 |
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... | 0.464159 |
ExploraTour - How to Build a Star
"But wait a minute," you say. "We've tried this nuclear fusion stuff on Earth to produce energy and so far it hasn't worked very well. How does the sun succeed where we have failed?"
You are right. Operational nuclear power plants on Earth use fission reactions to produce power. They w... | 0.692274 |
After participating in this activity, students will be able to:
- Describe the difference between herbivores, carnivores, and producers.
- Answer questions about the interdependence of herbivores, carnivores, and producers as members of a food chain.
- Answer questions about how pollution affects food chains.
All livin... | 0.839115 |
Formatting marks in a Word document.
Imagine that you have typed a few paragraphs. The paragraphs seem very far apart, and the second paragraph starts farther to the right than the first paragraph.
You can see what's going on in your document by looking at the formatting marks that Word automatically inserts as you typ... | 0.673926 |
From Ohio History Central
The Progressive Movement was a widespread reform effort to cure the many social and political ills in America after the advent of the Industrial Revolution.
During the late nineteenth and the early twentieth centuries, the United States of America underwent tremendous change. One of the princi... | 0.568223 |
stressArticle Free Pass
stress, in physical sciences and engineering, force per unit area within materials that arises from externally applied forces, uneven heating, or permanent deformation and that permits an accurate description and prediction of elastic, plastic, and fluid behaviour. A stress is expressed as a quo... | 0.77126 |
Hands-On Is Minds-On
Want to Engage Every Student? Break out the Old-Fashioned Scissors and Glue
Second-grade teacher Becky Hicks has learned that there is no substitute for activities that require kids to use their hands as well as their minds. During literacy hour in Hicks's class at Blanchard Elementary School in Ca... | 0.528866 |
The creation of dead zones begins when nitrogen and phosphorus from fertilizers used on land, and from raw or poorly treated sewage, wash into streams, into rivers, and to the sea. Thus fertilized, single celled drifting algae in the sea reproduce – bloom — until they reach abnormal densities.
The algae subsequently di... | 0.500877 |
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