Use the web links below to have fun while learning more about factors, prime and composite numbers, multiples, and divisibility.
Factor Lines - Can you arrange the four number cards (1, 2, 3 and 21) on the grid to make a diagonal, vertical or horizontal line? How many lines can you make? You can put a number card on a square with the same number, a multiple of that number, or a factor of that number.
NCTM Factor Game - Use the sliders to change the size of the game board. Take turns with the computer. On each round, one player chooses a product and the other player earns the value of all of the factors. (http://illuminations.nctm.org/Activity.aspx?id=4134) Or to play against human players, try Factor Dazzle at Calculation Nation. (You need an account to play other students.) (http://calculationnation.nctm.org/Games/)
Factors Millionaire - Only for Factor Experts, give this game show a try. It covers factors, divisibility, primes, and divisibility rules. (www.math-play.com/Factors-Millionaire/Factors-Millionaire.html)