Do you plan to make campus visits before deciding on a school? That could be very helpful with your mom. Most Greek Life offices will mett with you and give you information - many have tables set up or someone Greek talk with the students on campus visits. You can also pull up the Pamhellenic web site for that school that will give her information on the Greeks there.
Or, a story closer to my heart since I went to Alabama, google articles on the tornadoes that hit Tuscaloosa in April of last year. The sororities and fraternities did TONS of volunteer work that is documented. They all pooled whatever food was in theor houses and provided free meals for the emergency workers and the victims. It was unprecedented! Here's just one:
http://cw.ua.edu/2011/04/30/greeks-o...elief-efforts/