Illuminations: Birthdays and the Binary System

This lesson is a collection of three activities, all of which revolve around patterns and place value in the binary system.

Grades 5‑8 students are drawn into the mathematics by the “magical” ability to guess an unknown number and by the use of birthdays, something they find very relevant. This lesson plan is adapted from the September 1997 edition of Mathematics Teaching in the Middle School.


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Patterning & Sequencing, Place Value
Middle School, Educator

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Illuminations (National Council of Teachers of Mathematics)

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