TEACHING SUGGESTIONS AND REPORTS.

The article presents topics for science teaching. The assembly of the equipment for remagnetizing permanent magnets from noncritical materials is discussed. A description of the construction of dancing dolls for a class in static electricity is provided, using a sheet and a strip of Pliofilm. A modified or indented test tube was constructed and tested in the laboratories of Forest Hills High School and by teachers of the course Laboratory Techniques at Teachers College, Columbia University in New York. An explanation on the blood typing technique is presented.