A professor describes his involvement in the Trainers of Teacher Trainers Program (TTT). As part of his contribution to the program he has assembled a series of physics experiments which he demonstrates for teachers and students in both the secondary and elementary schools. A description of the experiments is also presented. (JP)

The advantages are related of a video recorder over a Polaroid camera for doing experiments dealing with the "conservation of mass and momentum." Use of video records is advocated for recording measurements in physics experiments. (JP)

Ten laboratory exercises on optics are described to clarify concepts involving point objects and converging lenses producing real images. Mathematical treatment is kept to a minimum to stress concepts involved. (PS)

Discusses the advantages and disadvantages of selecting coastal sand dunes as the location for field ecology studies. Presents a descriptive zonal model for seaboard sand dune plant communities, suggestions concerning possible observations and activities relevant to interpreting phenomena associated with these forms of vegetation, and additional…

Discusses five experimental methods used by senior high school students to provide an accurate calibration curve of magnet current against the magnetic flux density produced by an electromagnet. Compares the relative merits of the five methods, both as measurements and from an educational viewpoint. (JR)

Briefly outlines the theoretical basis of the phenomenon of photoconductivity and describes a simple experiment which demonstrates the photoconductive properties of cadmium sulfide. (JR)