Growing Ideas, the National Gardening Association's series for elementary, middle, and junior high school educators, helps teachers engage students in using plants and gardens as contexts for developing a deeper, richer understanding of the world around them. This volume's focus is on hydroponics. It presents basic hydroponics information along with suggestions for helping students discover concepts on their own, and includes numerous examples from actual classrooms where teachers explore this growing technique with their students. Also included are suggestions for supporting students' varied learning styles in both cooperative and individual activities. Chapter titles are: "The What and Why of Hydroponics"; "Meeting Plant Needs"; "Choosing and Nurturing Plants"; "Exploring Hydroponics in Your Classroom"; "Choosing Systems"; "Simply Super School-Made Soilless Systems"; "Resources and Suppliers"; and "Appendix: Homemade Nutrient Mix." (MKR)