Student exchange UK

Hey, my name is Jana and I live in a little city between Stuttgart and Ulm in Germany. I am 19 years old and I am attending the twelfth class in the Steiner School in Aalen. Next year, I am going to take my final examination.
I am looking for a homestay in England for a 4-week period from 25.03.- 26.04.2013, because I would like to improve my English language skills and get to know new people and a new culture.
Are there any opportunities or anybody who knows a kind host family??
I hope to find someone who is also interested in a student exchange :grinning: