I haven't seen mistakes, so I'm just making some suggetions, here it is if I was the one who would have written it.
I'm an English volunteer monitor. I chose to do it specially so I could unite both business and pleasure because I usually end up learning a lot when I'm teaching. I started teaching lessons twice a week, 4 hours/class. Then, I started working and my spare time was reduced, so I started giving classes only once a week, 2 hours/class. The art of teaching is an amazing thing and I really enjoyed to have this kind of responsibility. Anyway, it has been a great experience!
Again, it's just suggetions.