Shamus Culhane came up with a winning series of educational shorts, the Wonderful Stories of Professor Kitzel, which ran in syndication beginning in 1972, at first commissioned by Bristol-Myers for their short-lived Pals vitamins, which would sponsor the short pieces. After 4 years, Worldvision took over distribution. Until today, I hadn't seen any of these shorts, and over 100 of them were produced over 4 years (1972-6). I believe that after that, Culhane moved on to the series that I'm trying to find, the Spirit of Independence, which I did see.
Anyway, the professor (Paul Soles, ex-Spider-Man, Rocket Robin Hood) intros a bio on "John Cabot".