Learning Resources Fraction Tower Decimal Tower Cubes LER 2511 Lot of 3 NOS 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 remain in their original packaging. Perfect for stem activities are small group enrichment activities.  Each set contains 51 color-coded interlocking cubes representing 1 whole, 0.5, 0.33, 0.25, 0.20, 0.166, 0.125, 0.10, and 0.083, plus an activity guide. Great hands-on math manipulatives for teaching decimals, fractions, equivalency, and number relationships.