The main idea tells you the most important part of the passage. Each paragraph has a main idea and supporting details. Details are like the legs that hold up the stool. The main idea is the part you sit on! 1. First, click on the roller coaster to watch the video. 2. Then read the passage you have been assigned. 3. Tap the button. 4. Next, use the template to identify the main idea of the passage you have been assigned to read.