| If you're taking those classes, that's already 15 units. I don't think you'd want another class or you'd then have 18 or 19 units. But if you're mixing it up, I would definitely recommend English and probably sociology. If you're undecided and looking for something common, most people usually leans towards business/econ, accounting, psych, and sociology. If you're more into sciences, I would recommend that you DON'T take calculus. Take statistics instead, preferably Stat 18. For some other requirements, Anthropology and Philosophy tend to be pretty interesting.
You can also try to take classes that compliment each other.
ie. For IGETC, you may have to take Philosophy 25. You can also take philosophy 1, which would also fulfill a requirement. The info will cross between both classes and you'll do better. | 
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