List

Dotty Grids

Creating Squares
problem

Creating Squares

Age
11 to 16
Can you create a complete square before the computer? Play the game and see if you can find a winning strategy.
Areas on a grid
problem

Areas on a grid

Age
11 to 16
Challenge level
filled star empty star empty star
Draw some shapes on a dotty grid, and explore the relationships between the dots on the edge, the dots inside, and the area.
Coordinates of Corners
problem

Coordinates of Corners

Age
11 to 16
Can you find a quick way to determine whether four coordinates are the corners of a square?
Maxagon
problem

Maxagon

Age
11 to 16
Draw polygons on different sizes of dotty grid. What's the maximum number of sides you can create?