Yup, I remember that one. It was the first place I ever heard the melody for "The Name Game"! (That was the melody for this particular one.)
I believe that the Schoolhouse Rock team worked on it, including Lynn Ahrens. "Zack of All Trades" focused on future careers and what kids might want to do when they grew up.
I also remember one neat little series called "Willie Survive"about what kids should do when they found themselves in emergency situations. Again, that was from Ahrens and company. My favorite of them was always the one where Willie arrived home to find himself locked outhis mother had gone shopping and he'd lost his key. The cartoon went on to tell kids that if they find themselves in that situationdon't panic, go to a friend or neighbor's house where you know you'll be safe, keep calling home until you get an answer. I never ended up in that particular fix, but I knew what to do if I did! (Hard to imagine it happening in the era of cell phones)

You are thinking of "Zack of all Trades"
http://www.youtube.com/watch?v=zOYei-wNMyY
LOL I remember "hanker for a hunk of cheese!" Time for Timer!
No TV and no beer make Homer somethingsomething!!
Go Crazy?
Don't mind if I do!!!

I remember that one!!! Not Schoolhouse Rock but it came on back then. I've never seen any links however.
Do you remember the "Don't Drown your Food," one or the "Hanker for a hunk of cheese?" They were on back then too. I loved those things!