Identifying which state is surrounded by the Great Lakes can help answer this clue: His theorem relates to the relationship of the three sides of a right triangle. The answer to "A hill made of sand" can help figure out "What kind of number has as its only factor 1 and itself?" Student crossword puzzles provide educational fun for students at home, on vacation and in school. These crossword puzzles are excellent for reading improvement activities, classroom warm up exercises, improving students' internet research skills, and providing students some fun when there is a substitute teacher Visit www.studentcrosswordpuzzles.com to learn about books by grade level (pre-K, elementary, middle school and high school) and by theme (Star Wars, Harry Potter, The Hunger Games...) for grades 5 to 12.