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Playlist: Hansen 4th grade

Factors and Codes: First Names (Episode 2)

Scrambled up somewhere in 161,000 is a first name. Can you find it!?

Factors and Codes (Episode 1)

Let’s use factors to encode and decode words.

Evens and Odds – Addition and Subtraction

When we’re adding and subtracting, do evens make odds into evens? Do odds make evens odd? Which one has… more power!?

Undoing Multiplication With Division

Multiplication and division, natural foes, are constantly seeking to undo each other. Students will attempt to reverse the effects of multiplication by dividing once, twice, or even thrice!

Math Curiosity: Primes and Squares

Can any perfect square be written as the sum of two primes?