Take 5: Whoa, This Teacher Missed a Pretty Big Day

We don’t know a lot about substitute teaching, but we’re pretty sure you’re supposed to stay awake during it?

Here’s what else is happenin’ on the web today:

• Finally, an app that tells you when your caffeine will wear off! This would be great if we ever stopped drinking caffeine. [Engadget]

• We are obligated by internet law to share this dad’s “Let It Go” parody. [YouTube]

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