The only film I recall vividly seeing at school on the old movie projector (clack-clack-clack!) was this: http://www.youtube.com/watch?v=weaUOdCIBGQ
There were nature films and the like, but those usually made me sleepy -- they'd invariably show them after lunch.
In grammar school, the teacher would haul us into the "TV room" once a month for some educational program on speaking French. ("La plume de ma tante" stuff, remember?) Then we were supposed to pass a test on it, so they had to have a full-scale review, an early preview of "teaching the test."
They dragged us into the TV room for the John Glenn orbit launch too, I think. But it was live, and we sat there and sat there for one delay after another -- difficult for small kids. One kid asked if there was really a man in the capsule, and the teacher made fun of him. I thought it a reasonable question since we hadn't gotten a single glimpse of the astronaut. (Whaddaya want? I was 8, okay?)