In Beaver Sees America, Beaver says Whitey Whitney is going to summer school.

In a much earlier episode, Whitey says he's been smart ever since he can remember.

Hmm...which is it? Summer school material or smart?

Right Whitey was supposed to be very smart but in Part Time Genius he drew a chimney on the house like Beaver. I think later he got smart except he spelled Whom - H O M W.