2002. Robert G. Hoehn. A handy resource for middle and high school science teachers with 175 stimulating reproducible activities to add challenge and humor to instruction while helping students review important science concepts and terms and strengthen their thinking skills. The activities are presented in a wide variety of formats, including crossword puzzles, fill-ins, scrambled letters, word searches, problem solvers, riddles, and more, and can be completed by most students in 20 minutes or less. 227 pages. Spiral bound. Soft cover. Grade 6-12. EASY SCIENCE DEMOS & LABS. Thomas Kardos. These books are a collection of many classroom demonstrations. 10 specially created laboratory ideas for middle school level students help to present scientific ideas on a more concrete level, and add deeper level of understanding to the demonstrations. The labs are safe enough for young people to do on their own. Meet National Science Education Standards.