Social Networking for Spanish as a Second Language students

Hello everybody,
My name is Lola and I am a teacher of Spanish as a Second Language (for adults). I am creating a social network for Spanish students (all ages, interests and nationalities), a place where they could learn (the network has also activities, readings, listenings, etc.), share opinions, etc.
I would like to know if someone has any similar experience, in Sapnish, English or any Second Language.
Thank you very much!
Lola