RightStart™ Mathematics Level A Lessons Second Edition

The RS2 Level A lessons will build a firm foundation with number sense through quantity recognition and visualization strategies using the Cotter Abacus. RS2 Level A helps the child understand quantities based around 5s and 10s. This level includes addition and subtraction to 10, place value to the hundreds, and some basic geometry and measurement. Money and clocks are introduced. Card games are included in the lessons. Problem solving is emphasized. 

Here is a link to download some sample lessons.

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