Figuring out which U.S. city is called "The Big Apple" may be easier if you know which force keeps us from floating off into the atmosphere. Knowing how many teeth an adult has could help you figure out what the currency of the Philippines is. Student crossword puzzles provide educational fun for students inside and outside of the classroom. These crossword puzzles are excellent for reading improvement activities, map reading practice, classroom warm up exercises, improving students' internet research skills, and even providing students some fun when there is a substitute teacher Crossword puzzles--a healthy habit at any age (Developed by a certified teacher)