Look for squares of different sizes and also tilted squares
Start with a 3 by 3 grid of nine dots. Can you find six squares?
Then go on to the 4 by 4 grid of sixteen dots.
What can you say about the areas of the squares
How Many Squares for a 5 by 5 grid of 25 dots?
See the NOTES FOR TEACHERS
Play the Square It Game SQUARE IT GAME BOARDS
or play the game against a computer on the NRICH site