[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about the role of observations and experiments in scientific investigation. Includes a few questions to check for understanding.

Hunkin's Experiments is a group of simple cartoon illustrations of scientific principles. Some would work well in the classroom, but others have little value beyond entertaining students. All of the projects are easy to do. This group of...

Great animations showing how sound is produced.