1) Old educational visual medium 2) School projection
Found on
https://www.crosswordclues.com/clue/filmstrip
The filmstrip was a common form of still image instructional multimedia, once commonly used by educators in primary and secondary schools (K-12), overtaken at the end of the eighties by newer and increasingly lower-cost full-motion videocassettes and later on by DVDs. From the 1940s to 1980s, filmstrips provided an easy and inexpensive alternative...
Found on
http://en.wikipedia.org/wiki/Filmstrip
a length of film containing a series of related transparencies for projection on a screen.
Found on
https://www.infoplease.com/dictionary/filmstrip
No exact match found.
