2020 Summer Game #3: Drawing Tools, Squares, and Fractions

A couple years back, I attended the National Unicycle Convention in Rapid City, SD. Yes, you did read “unicycle.” They do things on unicycles that you just can’t believe. Hockey, for example. They play basketball. They race. They perform … [Read more...]

Dr. Cotter and Geometry

For years geometry was not considered a topic that primary students could or should study, even though they are surrounded by geometrical shapes. I had no geometry in school until 10th grade. Sometimes teacher education programs provide little … [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...]

RS1 Level G, Lesson 112

Luke gave me call for help with RightStart Mathematics: A Hands-On Geometry Approach, also known as Level G. He was on Lesson 112 and confused on the formula for finding the perimeter of iterations of a fractal. Huh, you say? Well, Lesson 112 … [Read more...]