Tag Archives: division

Why Do We Invert & Multiply? An Explanation

Ours is not to reason why, just invert and multiply.  WHY! Keep Change Flip WHY! My district’s focus, this year, has been conceptual understanding.  Therefore my coaching colleagues and I have been searching for a clear explanation to why we invert … Continue reading

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Efficiency is in the Eye of the Beholder

For the past two years, I’ve heard many math educators push the idea of mathematical efficiency. The more I hear the word, efficient, the more I cringe for I feel its usage suggests: Students are thinking inefficiently in defiance. The algorithm is the … Continue reading

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