Ten units which focus on subject-matter knowledge about energy and on the logic and strategy of problem-solving within science are provided in this user's guide. Each unit includes: a detailed summary of unit problems and activities; recommended grade levels and subject areas; possible learner outcomes and general goals; teacher background information; suggested teaching strategies; suggested learner strategies (small-group discussion, large-group discussion, research, classroom experiments, and demonstrations); student data sheets (when applicable); suggested evaluation questions; and a list of resources on which activities are based. Areas explored in the units are: (1) solid state physics (energy transfer); (2) heat containers (insulative properties of thermal cups); (3) problem-solving activities related to 14 questions about energy (Does hot water freeze faster than cold water? Does the state of matter influence its ability to hold heat? Can you make electricity using a magnet and a coil?); (4) energy changes; (5) energy cells; (6) thermal expansion and other energy characteristics (using hot dogs); (7) thermal patterns in snow, frost, and dew; (8) solar collectors; (9) heat transfer; and (10) energy concepts related to toys. (JN)