Lounge

Since you use the words parental involvement and test scores I assume you are talking k12 (primary-secondary school). I don't know whether you are coming at Moodle from an IT or pedagogical point of view, but if pedagogy is your angle you might take a look at the research both on "knowledge building" and "21 Century learning." Some names in Knowledge Building are Scardemalia, M., Bereiter, C., Zhang, J. These tend to use a program called "knowledge forum" rather than moodle, but their conclusions about collaborative learning, student to student (vs. student to teacher) communication, and treating knowledge as something that can be stored outside ourselves and collectively advanced is compelling.