Christopher decides to have the chapters in his book going up in prime numbers "Chapters in books are usually given the cardinal numbers and so on. But I have decided to give my chapters prime numbers and so on because I like prime numbers"

All about prime and composite numbers. Includes 25 pages of cards from

First & Second Grade Math 120 Riddle Cards for the 120 Chart Set 1

Runde's Room: Prime and Composite Numbers This would be a good sorting activity for a "sticky wall.

Lots of good number sense games! Boxed Out 120 chart game that is super fun! Directions in the post! Building Number Sense in First Grade

Prime and Composite Grade Common Core Game