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Valentine’s Day Codes

Teach your students about basic cryptography and code making.

From Frantic Questions to Sensible Sequence

For Teachers

Why was I asking five, unrelated, low-level questions in a row?

Natural Disasters Tournament

Earthquake vs. hurricane. Tsunami vs. wildfire. Students set the criteria, argue their case, and crown a champion. Warning: it gets heated.

An Olympic Sized Pool and 2 Liter Bottles (Episode 1)

How many 2 liter bottles could you fill up using the water in an olympic-sized pool?

What If There Were No Hundreds Place?

Imagine a world with no hundreds place. We’d have to call it ten tens instead. But then, what would we call the thousands place? How would we read 9999? What if we added one more?

Impostor Syndrome

For Teachers

The student who breezes through school may hit a wall in college. Here’s why — and what to do about it now.