There are many English extracurricular classes in Wuxi, but I don't know much about the better ones. You are now in the second grade, which is too difficult to learn. You can consider IELTS in high school and college. It is very important to improve junior high school English. I recommend you to learn English for teenagers all over the world. The teachers there are all very professional in Wuxi and have rich learning contents. There is also professional IELTS training there. If you want to learn, the address is at 1 1 Floor, Fortune Building, No.220 Renmin Middle Road.