mentor and protégé might become Study Buddies, choosing to learn together about a new instructional methodology or reading current articles on classroom related research. This common focus provides a launching point for creating new ideas and trying new strategies. The learning aspect is deepened when we identify and share feedback about our mutual experimentation and set new goals for learning and sharing.
I have never thought about this as a collaboration strategy before but I think this could be really useful. Attending PD together and learning new strategies side by side could be so supportive!