Foam Magnetic Fraction Bars. Fraction bars make learning equivalent fractions a snap! The nine fraction bars are color-coded for easy identification and break into perfect fractions so that students see and feel the parts that make up a whole. Use with any magnetic surface - for whole group instruction and in activity centers. Set includes 51 color-coded, proportional foam magnetic pieces showing fractions in a whole, halves, thirds, fourths, fifths, sixths, eighths, tenths, and twelfths.