Master fractions and their equivalents from halves through twelfths Boost skills in visualizing, comparing, and reducing fractions. Traditional 5 x 5 grid format can be played six ways to meet all skill levels. Ideal for large or small groups. Sturdy storage box is filled with everything you need! Set includes 36 playing cards, more than 700 chips, and caller's mat and cards. Ideal for 4th-8th grade (ages 10-13).