-Add & Subtract by 10s-

This low cost app connects and builds on work 1st and 2nd Graders have previously done with number lines. Now they use increments of ten, rather than one. A bug is used to explain the concept, and children interact with the number line and bug with touching and jumping.


This app fits nicely into a teacher’s lesson plan, and provides an individual re-teaching that struggling students need to practice many times. This app meets the Common Core State Standards for Kindergarten and First Grade. It includes both tutorial and practice problems.

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