We used an iterative process to design the Tiered Coaching Model (TCM) to support preschool teachers' implementation of the Pyramid Model. In the TCM, teachers are matched to one of three coaching tiers based on their observed classroom practices, individual characteristics, and preferences. Coaching tiers included self-guided coaching, small group coaching, and individual coaching. We describe TCM model development and two field tests exploring its potential usability and effectiveness. In Field Test 1, the model was tested with 16 lead preschool teachers. Focus groups and teacher feedback informed systematic model revisions. In Field Test 2, we gathered preliminary findings from an additional 24 teachers. All teachers across coaching tiers and field tests increased their use of Pyramid Model practices while engaging in the TCM, providing promising evidence for wider demonstrations and future rigorous evaluations of the model.