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Multiplication has been the mathematical downfall of many children (and adults!). It’s not so much…
Most people think of counting as the foundation of math; therefore, they teach kids to…
Dr. Cotter has an article published in the Hungarian journal Symmetry: Culture and Science, Volume 34,…
RS2 Level H, Lesson 91 September 15, 2023 by Kathleen Cotter Clayton Susan wrote us: “Hello, my son…
RS2 Level H, Lesson 82 September 14, 2023 by Kathleen Cotter Clayton Today’s blog is thanks to Joanna and…
The RS2 Level H Lessons 45, 46, and 47 are some of my most favorite lessons. They…