I propose a talk session that explores authentic collaborative projects and their value for music theory instruction. In his influential book, What the Best College Teachers Do (2004), Ken Bain recognizes that such projects can foster natural critical learning environments where deep-level cognitive processing is activated and meaningful, influential learning of lasting value takes place. Taking a sample project and its results as a point of departure, we will share ideas about other kinds of authentic collaborative projects that could be designed for purposes of music theory instruction. How should they be designed to yield desirable results and avoid common problems in collaborative work? At what level(s) should projects be implemented and how should assessment be handled? Collectively, we will determine answers to these and other questions emerging from discussion.