This document discusses digital tools for collaborating in ESL classrooms. It begins by explaining that collaboration is emphasized in Ecuadorian education policy and standards. It then reviews literature showing that collaboration promotes knowledge construction, and digital tools can support collaboration through asynchronous and synchronous interactions. The document discusses constructs of collaboration and cooperative learning, and proposes that digital tools allow language learning to take place through social interaction. It reviews specific digital tools like discussion boards, email exchanges, and computer-assisted language learning programs that have been shown to improve language skills through collaborative online activities. Finally, it discusses elements of effective online collaboration, including establishing roles, accountability, and providing structured guidance and feedback.