Collaborative learning, especially in blended design, stresses learning regulation processes both at individual and collective levels. Learning regulation is an active process involving behavioral, motivational, cognitive and affective regulation. It is exercised through recursive phases of task definition, planning, performance, and adaptation. In this research, we aim to support planning in Computer-Supported Collaborative Learning (CSCL). We articulate models of Self-Regulated Learning (SRL), Co-Regulated Learning (Co-RL) and Socially Shared Regulated Learning (SSRL). We address two contributions. First, to understand the contextual and individual factors that influence planning processes at the personal, interpersonal and collective levels. Secondly, to produce and evaluate principles for the design and integration of information and communication technologies to support collaborative planning. We are designing a plugin for LabNbook, an experimental science learning environment. The evaluation is being carried out as part of field studies at a French university.