I got an ENTJ teacher, too, and that was nasty. She was encouraging students to do "creative" stuff, but in an NTJ way, you know, all controlled and in a way how SHE liked it, so it wasn't creative/free at all. She was all hyper and seemingly funny, but that was only on the surface. In truth, she was one evil, manipulative, controlling, directive, and arrogant person - with all this underneath the "we are friends, aren't we" face. She was using an emotional ransom to do what she wanted with dummies: at first she established a friendly connection, and then assumed "you owe me something" attitude.
Basically I liked P teachers more than Js (Except ESTPs and ENFJs); they are much more correct with dealing with students than Js.