This activity is for students to use as a group or individually as a center. Each page is a a full set. A full set includes 3 detail cards and 1 main idea cards. Students should read each card and decide which card is the main idea making sure the 3 details correspond to the main idea. The main idea and details were all taken from non-fiction books. I copied these pages to colored pages to keep the sorts organized and separate from one another. As an extension- students can use the main idea and details to write a paragraph. You can also discuss topic based on the details and main idea.