Divide the class into two teams and have the teams line up in front of you. Place a bell in front of each team and stand in front of both teams with a stack of flash cards. The first student in each line stands in front of the bell as you hold up a flash card. The first student to ding the bell and give the correct answer gets a point. Continue playing for a specific time period, after which the team with the most points wins.
Decide whether you will use addition, subtraction, multiplication or division facts for this game. Draw two large grids on the chalkboard with 12 horizontal spaces and 12 vertical spaces. Write the numbers one through 12 along the top and left edges of the grid. Divide the class into two teams and have one person from each team race to the chalkboard, choose a grid to write a fact answer. For example, if you are playing a multiplication game, a student might choose the grid where the horizontal nine and the vertical five intersect and write the correct answer 45 in this square. If a student makes a mistake, another teammate can use his turn to correct the mistake. The winning team is the team that fills in its grid first.
Create bingo cards for students with grids and the answers to the math facts you wish to use. Make each bingo card different and make enough bingo cards for all students. Gather flash cards with math fact problems that correspond to the bingo cards you made. Call out the math facts slowly, giving students time to find the answers on their bingo cards. The winner calls "bingo" when the student gets a horizontal, vertical or diagonal row of answers. Check the winner's numbers to make sure the numbers fit with the facts you called.
Divide students into pairs and prepare a deck of cards for each pair by removing the face cards. Students should shuffle the cards and place them in a pile face down between them. Each child takes a card from the top of the deck and places the cards face up between them. Both students look at the cards and perform the operation in their minds. The first child to call out the correct answer takes both cards. The game ends when one student has all the cards. If you use this game with division facts, remind students to divide the larger number by the smaller number.