Challenge your students to a symmetry race by drawing two columns of symmetrical pictures, including a circle, a square, a star and a heart, on the chalkboard. Divide the class into two teams and have the teams form lines. On your mark, the first player on each team steps up to the board and draws the line of symmetry in the first picture in their team's column. If a player draws the correct line, the next player draws the line of symmetry in the next shape. If a player is incorrect or doesn't know the line of symmetry, he steps to the back of the line, and the next player tries to draw it. The first team to complete their pictures correctly wins.
On a set of index cards, draw both symmetrical and non-symmetrical images. Hold up a card for one player: she must state whether the image is symmetrical or non-symmetrical. If the player is correct, she earns a point; if she is incorrect, no point is awarded. Continue playing until all of the cards have been used. The player who earns the most points wins.
Since symmetrical items are the same on both sides, when divided in half, the halves are matching. On index cards, draw pictures of symmetrical items and cut the items in half along their lines of symmetry. Place one half of the cards in a pile and spread the other half on the floor, face up. One player at a time takes a card from the pile and tries to find its match on the floor. If a player is unable to find a match, he passes the card to the next player. The game ends when all cards have been matched. The player with the most cards wins the game.
Divide students into groups of two to four. Provide each group with the same amount of foam shapes that are symmetrical and not symmetrical. On your mark, the groups sort through the shapes, placing them into symmetrical and non-symmetrical piles. The first group to correctly sort all of the shapes wins the game.