Dr. Cotter on Subtraction Approaches

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 other methods to enhance understanding. If a child has an accurate and efficient method of subtraction, do … [Read more...]

Dr. Cotter on What 6 × 3 Means

Sometimes 6 × 3 is thought of as “6 groups of 3.” However, consistency with the other arithmetic operations requires a second look. When adding 6 + 3, we start with 6 and transform it by adding 3. When subtracting 6 – 3, we start with 6 and transform … [Read more...]

Dr. Cotter on Long Division

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 job doing long division. Long division with that guessing component is not used higher mathematics. It is rarely on … [Read more...]

Dr. Cotter on Multivides

For a child with learning disabilities doing multivides, I suggest this shorter version: Start with any 4-digit number and multiply it by 4, then 5, and 6. Then divide the final product by 4, then 5, and 6. The final quotient must be the same as … [Read more...]

Level G, Lesson 110

Nicea called me for help with RightStart Mathematics: A Hands-On Geometry Approach, also known as Level G. She is homeschooled and is working through the program with some assistance from her mom, Julia, and a little assistance from me. Today’s … [Read more...]

Struggling Learner: Check Please!

I don’t know about you, but I LOVE checking things off my list. I love to schedule and create lists. For me, lists motivate and inspire me to get things done. Sometimes I make a list just so I can check things off! However, I must admit, not being … [Read more...]