Engage students in grades 5-12 with crossword puzzles that mix clues from the STEM subjects and California's history, economy and culture. Who were the "bear flaggers"? What is the most popular method of desalinization? What are the two favorite numbers of computers? What kind of engineer would design and build heart valves and prosthetic arms? What is the fourth root of 81? Crossword puzzles--a good habit at any age (Developed by a certified teacher)