Material Detail

This lesson from Illuminations asks students to make and use slide rules to discover the properties of logarithms. The class will use rulers to add and subtract visually, which will add to the depth of their mathematical reasoning. The technique of using slide rules in this manner reinforces the hierarchy among the operations of addition, multiplication, and exponentiation. The lesson is intended for grades 9-12 and should require 1 class period to complete.

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