More to explore:
Classroom filmstrips - it was such an honor to be the one chosen to turn the knob at the "ding"! Miles of film strips are out there doing what? MJ
Filmstrips ~ Childhood Memories
Late 70's early 80's School Film projector
Filmstrips. There would usually be a record or cassette tape that you would play with the film strip and it would beep when the teacher was supposed to advance to the next picture. Pretty old school, huh?
Retro Film Projecter
Remember this? Yeah, it was "prime" nap time.