This paper introduces CoCo, a system designed to support and encourage collaborative learning among colocated students sharing a single mobile device. It provides teachers with the possibility to create digital lessons, configure parameters for collaborative activities such as the number of students and tablets, and monitor students' progress. On the other side, students use the tablet mobile application with an implemented split screen feature which can support up to four colocated users. This approach could be advantageous for organizations with limited technology resources and a restricted budget. [For the full proceedings, see ED659933.]