Learning Resources Fraction Tower Decimal Tower Cubes LER 2511 51 Pc NOS STEM Comes with all 3 packages. New old stock lot of 3 Learning Resources Fraction Tower Decimal Tower Cubes sets, LER 2511. From my grandmother’s collection; she was a teacher and collector. These appear unused and are still in their original packaging. Perfect for STEM activity and small group teacher table activities for enrichment time. Each 51-piece set includes color-coded interlocking cubes representing one whole, halves, thirds, fourths, fifths, sixths, eighths, tenths, and twelfths, plus an activity guide. Great hands-on math manipulatives for teaching decimals, fractions, equivalency, and number relationships.