PBS
Pbs Teachers: Scientific American: Forever Wild? Input and Output
Investigate the scientific principles of biospheres, and observe the effects of biological processes on closed systems.
Hunkins Experiments
Hunkin's Experiments: Salad on a Sponge: Grow Your Name
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. Both of these...