Following last week’s challenge theme (heroes and villains), this week’s theme is Big and Small.

Here are a few examples of lessons related to heroes and villains:
- Rebecca Kaplan’s lesson is about the biggest star.
- Josephine Skwish’s lesson is about size and scale.

This week’s challenge is to create a lesson around at least one video related to enormous and/or tiny things. You can flip any of our suggested videos below, or you can find and flip your own video exploring big things here and small things here.  Nominate your lesson as a Best Flip, and we’ll potentially feature it on the TED-Ed website!

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