Back in 1981, my high school's computer classes were something like Computer Programming I and II, which taught BASIC on the Apple ][+, and a Computer Programming III class.
In the III class, a couple of the more advanced students including me used some big IBM terminals to learn some Fortran (WATFIV) over a modem dialed in to a nearby university, but the rest of the class learned COBOL.
The machines they used were basically desks, with the computer built in. They had green CRTs embedded in them such that you looked down past the keyboard at the screen. I believe each had an 8" floppy drive to the side, where desk drawers would be. What would these machines have been? (I suspect they were from IBM, but I'm not at all sure)