Improving my ballet for classes?

Ok this might end up being long but I need some real professional advice to help me. I am 13 years old and am doing 1 1/2 hours of cecchetti ballet a week. I have done about 4 classes and yesterday was open week were my whole family came to watch me. My dad told me if I could improve on my balance I could be almost the best in the class. My teacher says I should also work on engaging my turnout. I know what this means but I need some exercises to help. I have also noticed that I quite frequently sickle my feet especially when I am in passe position. All of these problems I am willing to work hard to get rid of or improve but all i need are some exercises to help me! Any help is appreciated and I will award 10 points to the most helpful answer!