In law school there generally isn't any homework in classes about the law. The only classes with homework will usually be classes in legal research or in classes that cover non-legal subjects from a legal perspective. As an example of the later, at my school there was a "Quantitative Methods in Law" class that basically was an introductory statistics class focused on applications involving law.

For the classes that are about the law (contracts, torts, criminal procedure, etc) it pretty much all comes down to exams. I only had one take-home exam [1]. All the others were in-class.

The exam questions were mostly essay questions. There would be a couple paragraphs or so describing some situation, and you would be asked what the legal outcome should be. Your essay needed to identify the legal issues involved, cite the relevant cases and/or statutes, and argue how those applied to the facts of the case to support the result you were trying to argue.

[1] Note: I am not a lawyer. I went to law school when I got burned out with programming. By the end of law school I was no longer burned out, and decided I'd rather be a programmer who knows a good bit about law than a lawyer who knows a good bit about programming.