Purpose: This study examined how physical education preservice teachers (PSTs) developed adaptive skills in the planning of the lessons in the 5 weeks of an introductory physical education method course using the practice-based teacher education framework. Method: Twenty-two PSTs edited three lesson plans over the 5 weeks. A total of 150 lesson plans were analyzed using descriptive statistics to explore (a) the total number of adaptations, (b) the total number of adaptations made to core practices, and (c) the types of adaptations. Findings: The PSTs made a wide-ranged number of adaptations from lesson plan one to three (one [median = 38.50, range 6-101]; two [median = 49.00, range 14-184]; three [median = 38.00, range 18-97]). They made adaptations most frequently in providing clear instruction and type two adaptations (refine). Conclusions: The results support the use of pedagogical approaches within the practice-based teacher education framework effective in developing PSTs' adaptive competence in lesson plans.