Dr. Cotter on Technology
March 12, 2024
People had been seeking simpler ways to perform calculations for centuries. Engineers, until the 1960s, used slide rules, a hand-operated mechanical calculator. It is
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Dr. Cotter on RightStart and Montessori
March 5, 2024
Most people have heard of Montessori, but often they are not sure what it’s all about. The word Montessori refers both to a person and a
Dr. Cotter on Flashcards
February 20, 2024
Flash cards are not a good way to drill the facts. Many adults, because they could not respond fast enough to flash cards or
Dr. Cotter on Teaching Math
February 13, 2024
I’d like to take some time to discuss the science and art of teaching math. I call it a science because much research has been done
Dr. Cotter on Math Anxiety
February 6, 2024
Math anxiety can be thought of as a learned fear of numbers or anything to do with math. It results in feelings of tension
Dr. Cotter on Learning Disabilities
January 30, 2024
Approximately one in ten children has a learning disability. For most of these children, traditional methods of teaching math are a source of frustration
Dr. Cotter on Problem Solving
January 23, 2024
A few years ago while on a shuttle to speak at a math convention, I started talking to a young man next to me.
Dr. Cotter on 4-Digit Addition
January 16, 2024
Did you read the blog on addition and subtraction facts? Let’s continue this thought with 4-digit addition, using the Cotter Abacus. This approach and process helps
Dr. Cotter on Multivides
January 9, 2024
Did you check out our blog on division? And did you read about short division? Isn’t that just wonderful? Now, let’s talk about some practice
Dr. Cotter on Division
January 2, 2024
Long division used to be considered the ultimate goal of arithmetic. An earlier division algorithm was so complicated it wasn’t taught until college. Today