Read each night. While you are reading, try to find an example of each type of sentence: simple, compound, and complex. Copy the sentences and bring them to class on Friday.
If you would like to practice identifying these types of sentences, try playing this sentence sort game at http://www.harcourtschool.com/activity/sensort/index_pre.html or this game at http://www.time4writing.com/_games/swf.html?xml=assets/which_word/write_sent_simple_ms.xml.
For an opportunity to review the three types of sentences, you can view this PPT.