Cliff Petrak

Retired Teacher, Brother Rice High School

Free Educational Speaker in Chicago

  • Demonstrating and Teaching Mental Math Methods

    TOPIC CATEGORY: Educational

    Learn to master a multitude of little-known, super-shortcut computational methods involving addition, subtraction, fractions, squaring and multiplication. Unfortunately, our country consistently finishes among the bottom third of industrialized countries in the annual mental math competition for students. Learning these strategies and methods will leave your calculator-dependent friends in the dust!

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