Jewish Causes of Choice, Inc., a nonprofit out of Needham, Mass., recently inserted itself into today’s social network with the launch of jchoice.org, “designed to foster the next generation of Jewish giving among adolescents.” It teaches philanthropy by showcasing causes and providing an online community where young people can interact with those causes and each other. Founder David Rosenberg says an in-depth study has proved that “young donors want involvement … to understand the impact of their activism, and to be able to dialogue with their peers regarding charitable choices.”