Hide and reveal beads with resizable covers to pose problems and play games.Reverse the colors of rows 6 to 10 to distinguish (or not) groupings of 25 beads.Display 1 to 10 rows of beads, 10 beads per row.Slide beads one-by-one or in groups across a row.The number rack is a key component of Bridges in Mathematics, second edition. This virtual version of the manipulative is an open-ended educational tool, ideal for elementary classrooms and other learning environments that use laptops, iPads, or Chromebooks. Display up to 10 rows, each with 10 beads, to work with numbers up to 100. In the Number Rack app, rows of movable, colored beads encourage learners to think in groups of 5s and 10s, helping them to explore and discover a variety of addition and subtraction strategies. Number racks (also known as rekenreks) facilitate the natural development of children’s number sense.
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