Struggling Learner: Back to School
September 7, 2016
If you took some time off for the summer with your student, you are no doubt making plans to get ready to go back
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Tag: dr. cotter
Dr. Cotter on Subtraction Approaches
June 13, 2016
There are at least eight different ways to subtract multi-digit numbers. Even though a person has learned one method, it is good to explore
Dr. Cotter on What 6 × 3 Means
June 1, 2016
Sometimes 6 × 3 is thought of as “6 groups of 3.” However, consistency with the other arithmetic operations requires a second look. When
Dr. Cotter on Long Division
May 20, 2016
As far as long division is concerned, it no longer has the importance it had in past generations. No one today spends time on their