9 and 10 years old

Each solid fits in at least one cutout, and each cutout fits at least one solid. Which is which and how do they fit?

Christopher Danielson | Oct 25, 2020 | 0

Mathy picture book recommendations. Both old and new, these are some of my favorites.

Christopher Danielson | Oct 6, 2020 | 0

Some great recommendations for mathy fun in person and online, and a lovely book by A.O. Fradkin and A.B. Bishop.

Christopher Danielson | Feb 19, 2018 | 2

When children hit adolescence, the conversations need to be more about them and their interests. Here's what that looks like.

Christopher Danielson | Feb 15, 2018 | 4

Below zero temperatures lead to comparisons of positive and negative numbers, and the solution to 4 – (-1).

Christopher Danielson | Dec 15, 2016 | 3

Make math playful with a simple question that has uncountable answers.

Christopher Danielson | Nov 1, 2016 | 5

What do you say when your child says they don't like math?

Christopher Danielson | Jul 18, 2016 | 5

This beautiful book helps us see the world through a child's joyful, creative, mathy eyes.

Christopher Danielson | Jul 11, 2016 | 0

Which fits where? A three-dimensional challenge