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When musician Craig Robinson needs to find a day job to pay the bills, substitute teaching seems like an easy choice. He goes into it fully expecting to spend his days popping in videos for the students, but when he learns that they think his class is an easy A, he is surprised to realize he wants to inspire his students, using his music as an educational tool. However, the school's rigid principal is none too impressed with Craig's unconventional teaching style, so if he wants to keep the job he'll have to buckle down and shape up. Wikipedia