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, U.S. News reports. A veteran math teacher at Seminole High School in Sanford, Fla., Noll posts overviews and sample questions
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