[BadassFractal]

If you're doing any kind of composition where mixing and mastering are a mandatory component, you're strongly encouraged to have a proper set of cans, or even better, a decent set of monitors. The tech has gotten rather good these days, so you can get a decent pair for not that much. But if the class is primarily about the theory and the arrangement, and not so much about the final mix, then I don't imagine a good setup will be needed or even recommended.