Evaluation of Learning in Community-based Education

Colleagues, 

Someone in my state is seeking an answer to this question:

Do you know if anyone has done a bibliography (annotated?) on research done 
on the evaluation of learning in community-based programs? 


I'd appreciate your assistance in providing some input so that I can get an 
answer to her.  
Thanks!  Elaine Ikeda, California Campus Compact, ekikeda@sfsu.edu