Rekenreks (also known as arithmetic racks or calculating frames) are ideal for building number sense in students. The Rekenrek gives students a concrete, physical object to help develop and deepen their understanding of numbers. Students build a strong sense of 5 and 10 and learn about the relationships among numbers and operations along the way.PRODUCT PERKSSturdy wooden frames endure daily classroom use and are easy to clean2 rows of 10 beads each to show multiple ways of looking at numbers5 red beads and 5 white beads on each row encourages subitizingWHAT TO TEACHSubitizing: Color-coded beads help students identify numbers visually without countingComposing & Decomposing Numbers: Make and break values to five and tenAddition & Subtraction Strategies: Doubles strategies, near five, near ten, counting on