Eighty-five years ago, these Cleveland students are brushing up on the differences between amphibians, birds, mammals, and fish, thanks to their school system’s progressive use of radio in the classroom.  It had been experimenting with radio since 1925, and was one of the first three (the others were San Francisco and Beattyville, KY) to get an FM license to broadcast to schools.  The receiver was from Stromberg-Carlson, and the broadcast lessons were supplemented with these charts.

The photo appeared in the May 1941 issue of Radio Retailing.