Where can I find listings on homestays in Beijing near the Chao Yang district?

[Chinese Learner]

Hi,

My family (who are based in Hong Kong) has helped me to arrange Mandarin lessons in Beijing for a month, with one of the best Hong Kong based Mandarin schools; the Hong Kong Putonghua Vocational School. Apparently they have many branches in China.

http://www.mandarin.com.hk/

6 hours of personalized one-to-one lessons a day in class and 2 hours a day of 'activities' wandering around the city with the tutor - 5 days a week!!

However, they don't seem to deal with homestays and only have details of dorms or hotels. However, I am very interested in a homestay as I want to 'immerse' myself.

Does anyone know where I can find details of homestays in Beijing? Apparently, the school is in the Chao Yang district.

Thanks!!