Sounds like the idiot I have for Sciences. (Our school uses that nominer to teach us the coherence between Physics, Maths, Chem and Biology

)
Accept she is too bloody afraid to tell me anything. I can teach her about the contents of the book, the general subject, and even about the bit of psychology bit needed for teaching. In class, when she tells something completely wrong (has happened) and I correct her, she just says 'Well, I think he's right' and goes on. Aside from getting my class to except me, I think I can be a better teacher then her. And with good ground too, because I actually do explain bits of the matter to co-students, when they missed her explanation.
I'm afraid she had her pregnancy last year, and child no.2 isn't hurrying up enough to help me.
And don't get me started on the idiot I had for French in years 1 through 3. We had a replacement due to her being pregnant in year 1. I got 7/10, even once a 10/10. Now, aside from the bit of reading we do, I get 3/10, 2/10. My new teacher (year 4 now) is helping me recover a bit, but it won't get me through my exams easily. And I still can't order a bloody bread in French. (Not the one I want anyway)