Do you think a Spin Off show about Theo Huxtable teaching his 7th grade class could have made for a series ?

I could see it lasting maybe a season or two. I don't remember Theo's outside life, but I do remember some of the students having cool personalities that would make for good episodes.

What we did see was more than enough, though.

Technically, it did happen. After Cosby ended, Malcolm starred in is own sitcom where he was a youth counselor to afterschool kids which took place in New York. The show was "Here and Now". I remember it well.