If I have any announcements from class time, I'll post the details here...
To get LaTeX (la-tech) for typesetting math documents — like your homework or extra credit — visit either the TeX Users Group (TUG) or the LaTeX Project. They've both got startup documents to follow and also link you to the Comprehensive TeX Archive Network (CTAN) where you can get lots of cool packages and documentation. In particular, to typeset math documents in the most standard way, you'll want to get the amsmath package from the American Mathematical Society (AMS).
I'm set up to do LaTeX on my Linux box and my Mac, so I can help some there with ideas, app suggestions, or tips. Might even be able to help with installs. Never done LaTeX on Windows, though. So my capabilities might not shine there.
A student just pointed out this video to me of a person doing their math notes in LaTeX. They go through all their techniques and share a library of helpful macros (LaTeX for function). They are a math major, so their coursework is a little heady, but just see if you like their technique.
Remember that fancy typesetting is not necessary. But LaTeX will give you better results than Word with or without MathType. And either system is easier than scanning in your handwritten solutions to make a PDF. But if you have to hand me paper, I'm bound to take it. *sniff* *groan* *rubs his aching back*