While having ageless fun, the learning draws people into the excitment fo the games. Energy that increases both learning speed and retention so esily! While using Fraction Bars, social interaction skills will also be developed. By the Mathematician, professor and author Dr. Albert B. Bennett, Jr. The original, creative and fun manipulative for teaching fractions! Fraction Bars(R) have long set the standard for the manipulative approach to teaching fractions. Fraction Bars are the only manipulative that can be used to compare parts and show the relationship of differences. Package of 49 durable plastic Bars. Represents halves, thirds, fourths, fifths, sixths, tenths and twelfths. Can be used with up to four children. Grades 2-8.