I just noticed a set of cool tools that's available with an online subscription to the AMA Manual of Style: quizzes (and answers) on AMA style for references, "correct and preferred usage," punctuation, and grammar.
Once you're a subscriber and logged in, look in the left-hand column for the "Learning Resources" link. And any subscribers who would like to use the quizzes in a classroom can click a link to e-mail a request for permission to photocopy and distribute the quizzes; the JAMA and the Archives journals say that they will not charge for such use.
Go here to subscribe.
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