 In the game match-and-slap quadrilaterals, players try to be the first person to slap a quadrilateral property card that matches a quadrilateral picture card. The first player with the most matches, when the picture card pile is empty, wins the game. At the beginning of the game, spread out the quadrilateral property cards and the quadrilateral picture cards in two separate messy piles. The youngest person starts by flipping over a quadrilateral property card. Players alternate between the two piles when flipping over cards as players move to the left. As cards are flipped over, players try to match a property card with a picture card. Your goal is to be the first person to slap the card. Once you slap two cards, you must explain how the quadrilateral property card matches a quadrilateral you see on the quadrilateral picture card. If other players agree, you win the picture card. Return the property card face down to its pile. If no players believe the cards match, a new quadrilateral property or picture card will be flipped over by the next player. In this case, any player can match any existing property card with a quadrilateral picture card, but only one player can make a match on any player's turn. Some questions asked throughout the game are, how did you decide that a property matched a quadrilateral picture? Is there more than one type of quadrilateral in the picture that matches a property card? Pause the video during the next Think About It slides to check out more questions. There are several variations for this game. In one variation, players play in turn. On your turn, flip a property card and a picture card. If the cards match, state how you know and keep the picture card. Return the property card to its pile face down. Any unmatched cards remain face up on the piles. Players match one picture card with one property card per turn. Play moves to the left. Here is a clip of this variation being played. As you can see, the player matched a picture card with a property card that another player flipped. There are also other variations. Please pause the video to read them. Click on the instructions link on the Regional Math Center website to read the game rules or just re-watch this video. Pause in as needed. Thanks for playing.