Purpose: Leadership coaching is an increasingly popular development tool for school principals. However, specific coaching behaviors are rarely conceptualized or examined in prior research. This study presents a coaching behavior framework and then analyzes actual coaching conversations between principals and coaches to illustrate how specific coaching behaviors create opportunities for principals to reflect and think critically about their leadership. Design/methodology/approach: Building on theories of interpersonal learning, the authors develop a framework of coaching behaviors to distinguish coaching inquiries and assertions that facilitate critique and reflection and, therefore, activate opportunities for learning. The authors use this framework to code transcripts of 55 principal coaching sessions. The authors analyze the prevalence of certain coaching behaviors and then examine qualitative patterns in how the use of certain behaviors shapes the nature of coaching conversations. Findings: Only about one-third of coded coaching behaviors in the analytic sample are categorized as coaching inquiries and assertions that activate opportunities for learning. In the qualitative comparisons of extracts from coaching conversations, the authors find coaches' use of these behaviors produced richer, more meaningful dialogue. Originality/value: Unlike much of the past research on leadership coaching, this analysis examines what happens in conversations between coaches and principals. This framework could be applied to a broad range of coaching programs intended to promote professional learning.