Based on well-known concepts, including organizational creativity, inclusive leadership theories as well as the input-process-output and its extended version, the current study investigated the effects an inclusive leadership style had on creative teaching through the mediating roles of intra-school knowledge sharing and innovative climate. A questionnaire using a convenience sampling method was conducted among 490 high school teachers in Vietnam, with a return rate of 95.5% (468 respondents) and 446 valid datasets for purposes of analysis. The study indicated that an inclusive leadership style has a positive effect on knowledge sharing, innovative climate, and creative teaching. The mediating role of knowledge sharing and innovative climate were also established in relation to inclusive leadership style and creative teaching. Theoretical and practical implications from our research include recommendations for governments, educators, and policymakers.