Interactive Multiplication
Try out this interactive applet to visualize, explore, and practice multiplication.
Kids 6+ can play with linear algebra … and you can, too
A huge idea in advanced mathematics is that you can add objects that aren’t numbers. People often don’t learn about this surprising concept until college…
Sorry! + an unsolved conjecture = this printable math board game
When did you learn that there are still unsolved problems in mathematics?
Do you have a favorite unsolved problem?
For me, it’s a close tie among…
Printable Yodoku puzzles for 5-8 year olds
The goal of Yodoku is to place consecutive integers 1, 2, 3, … so that the numbers in each row and the numbers in each column are always increasing. This means…
