This is an excellent PowerPoint over main idea and supporting details. The first several slides include definitions (topic vs. main idea vs. supporting details), passage examples, a variety of graphic organizers, process charts, and slides that create relevancy. The next several slides contain short passages with multiple-choice questions. Students choose which answer tells the main idea of the given passage. Answers are included for this section. I used this PowerPoint when introducing main idea to my students, and they were very engaged with each slide. Excellent resource!