Our Mr. Sun was my first AV experience in Elementary School back in 1961 (Grade 5), and I am certain that having seen it helped to kindle my interest in Science Education......I became a science teacher, and have taught Grade 7 science for the past 33 years. Some of the scenes in this film stuck with me, particularly the animated scenes with Mr. Chlorophyll and with the recipe for the photo-electric silicon wafer. I rate this film highly for classroom use still today. For one thing, there is precious little available in instructive video on the subject of Solar Science. For another thing, I believe that watching this film intent on filling in some of the science that was little understood or misunderstood at the time is a useful exercise. As a part time social studies teacher I also find that examining the sociological content of the film, in consideration of its 50 year old values and assumptions is quite instructive. As to any criticism of moralistic bias in this film, of course one must always remember its vintage foremost, before criticizing the screenwriters, since times, they sure have changed!!!