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Printable Optical Illusions Worksheet for the Classroom (Free)

By Illusions Blog · Updated · How we make them

Print it, hand it out, and let students guess before they measure. The answers are on the last page.

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How to use it in class

  1. Hand out the sheets and ask students to answer each question before measuring anything.
  2. Then let them check with a ruler, or by covering the background with paper.
  3. Talk about which illusions survived measuring: most people still see the difference after they know the answer.

Each illusion has a live version on this site with sliders, so you can project it and change it in front of the class. The kids guide has a science fair experiment.

Frequently asked questions

Is the worksheet free to copy for my class?

Yes. Print as many copies as you need for teaching.

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