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There's no reason upper grades' concepts can't be fun and festive too! Students will use this Valentine flip book to progressively solve number puzzles. Clues incorporate prime numbers, factors, multiples, and a few fun twists to narrow down the possibilities. After students solve their number puzzle, there is also a follow-up practice sheet with more number puzzles to solve.
This would make a great bulletin board display!
Directions for assembly and answer sheet provided.
This activity fits best with the 4th grade math curriculum (4.OA.B.4), but would also be good review for 5th graders.
If you like this activity, check out my Vocabulary Flip Book for Grades 3 - 5.