Wasn't expecting to see Sesame street on the list. You could indeed argue its a system for broadcasting information to young children. But by that definition would a teacher with a standardized textbook not apply as well (only less technologically advanced as it uses paper instead of radio waves)?

I fondly remember the first time I did a computerized spelling exercise at school. Especially in what I didn't learn (spelling) and what I did (Windows 1.0 when I minimized the application and started clicking around).