In technical-writing courses, the main focus is typically the technical report, due toward the end of the semester. Just about everything you do in the course is aimed at developing skills needed to produce that report. Of course, some technical-writing courses begin with a resume and application letter (often known as the cover letter), but after that you plan the technical report, then write a proposal in which you propose to write that report. Then you write short technical papers where you get accustomed to using things like headings, lists, graphics, and special notices—not to mention writing about technical subject matter in a clear, concise, understandable way that is appropriate for a specific audience.
Warning: You should be aware that technical-writing courses are writing-intensive. You will probably write more in your technical-writing course than in any other course you have ever taken. If you are taking physics, calculus, and intermediate accounting and are expecting a baby this semester—well, maybe, this is not exactly the right semester for technical writing.