Compeling Research in Support of S-L

We're preparing materials for a planning session designed to consider 
the ways in which we would like our S-L effort to expand on campus and 
would like to feature a discussion of educational research which 
provides a compelling case for S-L.  Of particular interest is research 
indicating S-L as enhancing student retention and success (class 
engagement, grades, achieving educational objectives, etc.).  To 
supplement our research in this regard it would be great to have any 
members of the S-L listserv  pass on your favorite/most compelling 
research references addressing these S-L issues.  Thanks.

Dave Hobbs
Community Service-Learning Program
Los Medanos Community College
Pittsburg, California