Pretend you’re a high school student getting your nightly Facebook fix. As you scroll through your news feed, what do you see? Photos, gossip, YouTube videos, and calculus homework.

Wait, what? Homework on Facebook?

For students in Donna Noll’s calculus and algebra classes, that’s exactly what they see—and hear. A veteran math teacher at Seminole High School in Sanford, Fla., Noll posts overviews and sample questions recorded on her so-called “magic pen” to her fan page, SemiNoll Math. She uses Livescribe’s smartpen­, which records her voice, as well as what she writes, and combines the two into a PDF, creating a pencast.

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