I just arrived to the UK and I cannot keep up with my English classes. What can I do?

Listening & Speaking: get involved as much as you can with your class-mates. Learning a language by using it everyday is the quickest way to become fluent in it.

Reading also helps a lot to understand syntax, to enlarge your vocabulary and to improve the way you speak.

Writing: take note of all vocab you don't know, look it up in a dictionary and then try to use it appropriately in text. If you are not sure ask a native friend or the teacher.

Most important is keep practicing and don't give up!