First off, what are your goals here? Two things you've mentioned concern me if your goal is to learn ballet:
1. They have tap classes at the school as well. While this does not in and of itself diminish the quality of ballet instruction, it is an indicator.
2. They put you en pointe with less than a year of training. This is a serious, serious problem. Even if it does not lead to injury, it won't lead to you dancing well either.
If you continue on this course, you will likely have no future beyond high school as a ballet dancer.
My advice would be that if you wish to learn ballet (and not get injured) --- then find a school that's serious about teaching ballet. And don't expect to go en pointe until you've studied ballet seriously (3-6) days/week for at least a couple of years.
My other advice is to get used to studying with children, for now. Ballet class is not a social hour. If you wish to dance well in the future, you have to start at the beginning and work your way through the training program. Most of the people in your age group have more experience at this point, that's why they're in a more advanced class. Within 3-5 years, you will probably be placed with your age group, since you will likely learn faster than the children. But it takes time and dedication. In the meantime, you can be of help in the children's classes: although you're not any more advanced than them in technique, you are more mature and can help the teacher that way if you take a positive attitude.
Thanks for your advice, but no thanks. I don't think that the pointe is a serious problem at all. My dance teacher has been teaching for thirty years, I think I'll take her judgement when it comes to pointe, seeing as she's been doing it for thirty years. As far as everything else goes, I believe I do have a somewhat better technique than they do because they've been dancing longer than I have and they don't even know what they are doing. Thanks.