Play: Draw the layout with the chalk - 3 single squares, 1 double square, 2 single squares, 1 double square, 1 single square. You can number the squares if you want. The two basic rules of hop scotch are 1) one foot in each square only, 2) Hop over the square with the rock in it.

Use a rock to throw into the first square. Hop on one foot over the square with the rock in it. Land with two feet on the double squares. On the second turn, throw the rock into the second square, and so forth. The tricky part is staying on one foot when the rock is in one of the side-by-side squares.