For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

Helping students to develop math fluency takes more than just flash cards. It requires teaching them how to think about ...

I probably could have guessed that. What an interesting shop. NARRATOR: That’s a good idea, Fin. Arrange your credits into stacks of 10 to make them easier to count. 1 stack of 10… 2 stacks of 10.

NARRATOR: Yes, that is quite a hard sum. It might be easier if we separate the 17 into a 10 and a 7, and the 14 into a 10 and a 4. That gives us a 10, a 10, a 7 and a 4. Let's start by adding the ...