The document describes a learning cell, which is a small peer learning group of 4-6 professionals that meets regularly for 2-4 hours per session. The group has an overarching theme but discusses detailed topics in an open manner. It operates with principles of openness, trust, balanced participation, and learning from each other rather than proving points. Typical sessions involve check-ins, planning the agenda, carrying out the planned discussion, and summarizing the key outcomes.