I've extended the Spirolaterals game to use not only right angles.

This activity is part of one of my iPad offerings which is no longer available so I decided to make a web version.

My latest (2021) source of much fascination.

Reading Jo Boaler's "Mathematical Mindsets" led me to create this activity. The latter part works well with pupils taking it in turns to come up with a different Growth Story.

Martin Gardner's Pentominoes have been so popular that I decided to add a 6 tile version!

An old favourite - using four fours and basic arithmetic to generate the first ten numbers.
And here are some interesting follow up ideas.

A very friendly and fun introduction to how computers do their stuff.