Outdoor Math: Representing numbers

We used sidewalk chalk to create number lines counting back from 20.

We added a shape review to our number lines.

This is an outdoor version of bears in a cave.  We call it splat.  We put 10 of something (circle in this case) in the middle of our group.  1 child hides from the group and another child picks up and sits on a certain number of circles.

When the hidden child returns they have to figure out how many circles are missing based on how many they can see.

Using white boards outside to represent numbers in different ways.