I'm doing it too. I am preeeetttty worried about it, really...our teacher for the historical topic had a stroke over Christmas (he's fine, but not back in school yet) so we've basically just been piled with sheets and told to hope for the best. And if I don't get an A I'm screwed too.
The thing is, I just don't know how many works I need to know for the historical bit (I'm doing Aspects of Romanticism which is just the WORST, I can't stand romanticism...literally ANY of the other topics would have been better, and I especially wish we were doing topic 4 since it's covered so well in the ********* book). I've got a *kind of* overview of the basic ideas Wagner was working to, a bit on Rossini, a bit on Sullivan, and I'll be self-teaching some Berlioz this week. I know Schubert and Schumann in more detail, can quote some bits of their lieder, and I can ramble about the influence of Goethe.
But it's SO HARD to learn ANY musical quotations from Wagner. Partly because it's SO rambly (baaaaahhh, just CADENCE already) but also because there's just so damn much of it. I don't know which bits are and which aren't important. And I'm not quite sure how well I need to know it musically, or whether the historical/context side is more important.
Paniiiiiiiiic.
I'm also really hoping I won't just completely freeze up in the synoptic question. I'm good at the general ones (please, PLEASE let 'Is Tonality Dead?' come up again...) but not so good at the ones focusing on socio-political stuff. Gah.