The document discusses three projects that used online collaboration for learning: Streaming Theatre, BIM-Hub, and AMORES. It notes that online collaboration can be effective for learning if it includes an online social aspect to build trust and facilitate communication. While students have strong digital skills, social interaction does not naturally occur online and needs to be specifically designed through activities. Both synchronous videoconferencing and asynchronous tools like forums and file sharing were used across the projects, but maintaining social connections was a challenge without in-person interactions to establish relationships initially.