I am a new user here, and I am not good in English, too.
So, I will be really sorry if I mislead you.
Here are some of the problem that I found.
You can see them as a reference.
Wish you good luck. =)
Having aninterested and passionate teacher could help the student to be attracted to a special field and can change his life.
Here I think you should use "interesting".
, because when you are not interested in some thing,
In my knowledge, it seems that you can't put a "," before because.
For instance, the professor, that I mentioned before, always used to speak so impressive about the subject he was teaching that you would feel that he has gone really through the meanings and take the subject into his real life, which in my opinion was the key point of being a good teacher.
I'm not sure of it. But I think the sentence is too long and which will easily make the reader distract.