According to there is a new Education career in The Sims 3 Ambitions.  Here is the link to the article:  Thanks to GizmonicInstitute for pointing this out.

Here are the career levels of the rumored new career:

1st Playground Monitor
2nd Teachers Aide
3rd Substitute Teacher
4th Elementary School Teacher
5th Middle School Teacher
6th High School Teacher
7th Department head
8th Assistant Principal
9th Principal
10th District superintendent