Take a deck of cards. Deal all the cards from the deck to the students. The goal of the game is to get rid of all your cards.
Let's say the player doesn't have the card he is supposed to put down, for example a 3, the player must try to "lie" or fool the other players into thinking he has the card so he can play... if other students have any doubt they shout "liar" if the player was lying he then pick up the pile at the center of the table. If the player who is accused of lying was telling the truth it is the player who accused him who must pick up the pile in the center.
All players MUST put down a card when it is their turn, even if they do not have the required card. The game is over when one of the players has no more cards.
