I spent two weeks in December in Hebron studying Arabic at the Excellence Center. The program with my teacher was very well structured. She has a degree in education and the Arabic language. We worked on grammar as well as on the spoken Palestinian dialect. I learned a lot in this two weeks.
I stayed with a Palestinian family during this time and experienced life as the locals do. It was wonderful to spend time with the family and get to know more about the culture. For anyone considering to visit in the winter I would highly recommend preparing for the cold. Don't let the weather forecast fool you, the temperature doesn't seem low but it is VERY cold here! There is no central heating in most of the buildings so come prepared with you warmest clothes.
The Excellence Center is a great place to learn Arabic and experience Hebron!