In tests for teacher Tom Farber's high school class, students can demonstrate their mastery of calculus and find out where to get braces or even a haircut.
"It raises money for the teachers and it's amusing for the kids, so it seems like a win-win," said Luke Shaw, 18, a student at the suburban San Diego, California, school.
The teacher charges $10 for a quiz, $20 for a test or $30 for a final exam. For that price you could insert a personal inspirational quote or a business advertisement at the bottom of the first page.
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