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“Don’t Lose the Light”- a Hands-on Approach to Exponential Decay

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This hands-on lesson helps students understand exponential functions by using an LED circuit. LED luminosity decreases at an exponential rate as more are added in series.
As students add more lights to the circuit, they will see the brightness of the lights dim and by measuring luminosity with a simple cell phone app, the students can actually chart the decrease in luminosity and find a trend line.

Lesson Grade Level

10th Grade 11th Grade 12th Grade

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This lesson takes students through the process of creating an interactive storyboard using a Makey Makey circuit board. This lesson can be adjusted for any grade level with examples given in the 4th