The premier Tier 3 intervention for the Pyramid Model, Prevent‐Teach‐Reinforce for Young Children (PTR‐YC) is a research‐proven, family‐centered approach used in preschool settings nationwide to resolve persistent challenging behaviors. Now this bestselling PTR‐YC guidebook is in a thoughtfully revised second edition, with enhancements and additions informed by user feedback, the authors' training experiences, and new studies on the effectiveness of the model.