*“Wythoff’s Nim” is free on this website for one week only. It’s an excerpt from 312 Things To Do with a Math Journal, available as an ebook at my bookstore (Thank you for cutting out the middleman!) and in ebook or paperback through many online retailers. Read more about my playful math books here.*

Many parents remember struggling to learn math. We hope to provide a better experience for our children.

And one of the best ways for children to enjoy learning is through hands-on play.

Use this strategy game to prompt math writing: What did your children notice about the game? How did they decide their moves? How is this a Nim game?

## Wythoff’s Nim

**Math Concepts:** chess moves, strategic thinking.

**Players:** only two.

**Equipment:** chess set or graph paper.