At most colleges, marijuana is very much an extracurricular matter. But at Med Grow Cannabis College, marijuana is the curriculum: the history, the horticulture and the legal how-to’s of Michigan’s new medical marijuana program. ...

Even though the business of growing medical marijuana is legal under Michigan’s new law, there is enough nervousness about the enterprise that most students at a recent class did not want their names or photographs used. An instructor also asked not to be identified.

“My wife works for the government,” one student said, “and I told my mother-in-law I was going to a small-business class.”

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