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US Environmental Protection Agency
Epa: Determining the P H of Common Substances
In this acid rain experiment the students will be "determining the pH of common substances." This is a great lesson plan for an experiment.
Centers for Disease Control and Prevention
Centers for Disease Control: Science Ambassador Fellowship: Lesson Plans
This site gives many lesson plans for teaching middle and high school students about current and relevant science topics like autism, ADHD, Diabetes, Fetal Alcohol Syndrome, birth defects, genetics, and more. The lessons are based on...