I don't know from personal experience what it is, however, I looked up the curriculum for Tennessee and I think it is one of two possible courses. First, "content area reading", which teaches methods of reading and word analysis to be used not only in English but also in math and social studies. It seems to also teach some basic linguistics, such as decomposing words into phonemes.
http://www.tn.gov/education/ci/english/doc/ENG_3081.pdf

Second, is English II, which teaches grammar for writing and speech through individual and group work for writing to various audiences in various ways (i.e. stories, poems, speeches, etc...). It also teaches editing skills, basic research skills (i.e. verifying sources are credible and not bogus). Lastly, it teaches basic logic for composing sound arguments. This last part I have personal preference to because I enjoy engaging in formal debates, so you would also learn how to counter arguments in the form of thesis-antithesis-"new thesis".
http://www.tn.gov/education/ci/english/doc/ENG_3002.pdf

This doesn't mean you will have either of these courses because your school may use some other course, so this is just meant to be as best of a guess as I can give. Many schools post content online so you may be able to find your courses online or e-mail the teacher or principal.

Good luck in your studies!