This worksheet is a nice way to to review previous knowledge. Everything is here: grammar (tenses, modals), topic vocabulary (free time activities, school subjects, extreme sports, music, description of a person/city, etc). Also, it gives students the chance to talk about themselves and it's a nice icebreaker especially for shy newcomers who otherwise wouldn't talk about themselves.
Instructions: Students can mark 3-4 squares; YES / NO answers depend on the position of their ships; if students guess correctly, they can make another guess.