The Memorization Booklets aid in memorizing facts. The Addition and Multiplication Fact booklets for memorization of the math facts for rapid recall. The Supplemental Clock Booklet reinforces the skill of telling time. All sets of booklets are in packs of 20. All Items The products in this category: • Addition Tables and Mixed Facts Booklets • Multiplication Tables and Mixed Facts Booklets • Squaring and Cubing Booklets • Clock Booklet • Rounding and Comparing Numbers • Fraction, Decimal and Percent Booklets • Division Tables and Mixed Facts Booklets • Decimal Operations • Subtraction Tables and Mixed Facts Booklets