About this app
A tool similar to the Rekenrek. Options include showing from 1 to 10 rows of 10 beads to use in solving your own problems. Select the color pattern of the beads… traditional 5 Red/5 White; or, show pairs of colors, alternate colors, or all red beads. Two other options include: • identifying the number of beads hidden. That activity may be used with 1 to 10 rows of beads. • solving addition or subtraction problems with sums or minuends to 20. Adjust the sums and minuends as appropriate for learner goals. Developed in conjunction with the NumberSense Project at Augustana College, Rock Island, IL
Latest release
What’s New
Fixed a display issue seen on the 12.9 inch iPad Pro.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 12, 2026 · 4:54 PM Free
Screenshots
