Dr. Cotter on Development

The terms development or developmentally appropriate are frequently used, but finding good definitions is difficult. A dictionary defines develop as growing and becoming more mature or advanced. We see physical development in the young child. We know … [Read more...]

Dr. Cotter on Grandparents Helping Teach Math

The best way a grandparent, family member, or friend can help a child with math is valuing math and showing a positive attitude. Sadly, about 50% of Americans are afflicted with a strong distaste for math. Unfortunately, developing math anxiety … [Read more...]

RS2 Level F, Lesson 105

Lesson 105 in RS2 Level F is titled Dividing Fractions on a Fraction Chart. This lesson is very critical to understanding division of fractions. Yes, when dividing fractions we are generally taught to just invert and multiply. But why? Why does this … [Read more...]

RS1 Level G, Lesson 92

We just had a student email us with questions about Level G, Lesson 92. Well, actually, it was Worksheet 92-2, problem 5. Obviously, we need to see what the problems looks like. Here is the first problem. We are given an object and are to … [Read more...]

RS1 Level G, Lesson 121

We've had a few calls about Lesson 121, Fibonacci Numbers and Phi, from Level G. This is a hard one, but, oh, what fun when you get it! So, rather than type a long winded explanation and have you read it, I decided to make a video for you. … [Read more...]

RightStart™ Manipulatives

What’s so special about the manipulatives used for the RightStart™ Mathematics program? Let’s run through the list. NOT AVAILABLE ELSEWHERE: AL Abacus: This abacus has 100 beads, is grouped in 5s and 10s using color. It is different from the … [Read more...]