Social media site/service for MSc students

[doodah]

Question for social media pros. A colleague who runs two MSc courses has asked if I can help her; the students would like a portal to share information/provide input only accessible to them.

"Students want to talk to each other via media (ask each other questions etc) without teachers or other university staff involved"

Is Facebook the answer or is there a better alternative? Need a free solution. Thanks

 

[doodah]

Thank you for the quick responses.

Which ever is easier and requires minimal maintenance. Forum sounds a little overkill perhaps.