Suggests that the 16mm. Pennsylvania films with the "Viewer's Guide are the best, most complete tools presently available for formally and informally teaching good laboratory and attendant materials usage. Films were prduced by Pennsylvania Department of Public Instruction. (DS)

Technological developments, which have improved and increased the audiovisual materials and mechanical aids available, can be especially useful to teachers of science, math, and foreign languages. This technology revolution is not a threat to teachers, but a source of educational tools to be used as a part of an overall teaching design. Most…