add labels to markdown placeholders

app.py

@@ -174,8 +174,8 @@ with gr.Blocks() as demo:
     
     with gr.Column():
         progress_output = gr.Textbox(label="Progress", interactive=True)
-        performance_output = gr.Markdown(label="Performance", container=True)
-        lesson_intro = gr.Markdown(label="Lesson Intro", container=True) 
+        performance_output = gr.Markdown(label="Performance", container=True, value="Performance")
+        lesson_intro = gr.Markdown(label="Lesson Intro",  container=True, value="Lesson Intro") 
 
     tab_contents = []