Theme Vs Main Idea Worksheets Teaching Resources | TpT Theme vs. Main Idea Anchor Chart & Activity sheet | Print & Google worksheets. by. Joyful 4th. 4.6. (32) $4.00. PDF. This great set is the perfect activity for helping students understand the difference between Theme and Main Idea. Included is a colorful set that is perfect as an Anchor Chart and activity. 6 Theme statements that match up with ...