After a lesson about symmetry, we played a simple game on the white boards to help our friends practice symmetry. Each student drew a line of symmetry and a design on one side of the line. The students swapped and exchanged boards so the partner could draw the matching image along the line of symmetry. You can even play it at home with paper! It was great fun and the game is simple, simple, simple.
I find that students either "get it" right away or they have some challenge so the take home message is.... practice, practice, practice.