There used to be a show on that had a really big space ship and it was crewed by kids. That is all I can remember but if anyone has any ideas please hook me up.

When was it shown? Year(s)/decade

The first show that
Comes to mind is

Space Cases

If not,
Any more info?

I believe it was in the 80's. I have a very vague memory of it only.

There was a short live-action TV series
Made by Filmation

Space Academy

view opening (http://www.youtube.com/watch?v=jsz1CO0Dqxs)

view clip (http://www.spike.com/video/space-academy-first/2811239)

That may be it. Thanks!