About Fence Around
A shape is drawn as an outline with numbers along its sides. Your child adds up every side to find how long the way all around is, which is called the perimeter. On a rectangle only two sides are marked, so the opposite sides must be worked out first.
How to play
- Read the numbers written along the sides.
- Work out any unmarked sides, add them all and tap the total.
- On a computer, choose with the number keys, 1 being the first answer.
What your child practices
- Finding the perimeter
- Adding up side lengths
- Opposite sides of rectangles
- Measuring around shapes
How it grows with your child
YoungAges 6-8
Rectangles with two sides marked and sides up to 9.
Big KidsAges 8-11
Rectangles with sides up to 15, and L-shapes with every side marked.
Play together
Measure the edges of a rug or a table in hand spans, then add all four sides together.
