This conference presentation examines planning tools that provide professional development opportunities to build capacity and improve student achievement, focusing on year-round education. It emphasizes how to bridge the current gap between professional development practices and a professional's capacity to enable students to meet standards by understanding and using time and the calendar. It also emphasizes how and when to use tools for planning professional development that focus on student achievement through the use of time and the calendar. The presentation explains how to renew professional staff through POTENT (Purpose, Outcomes, Tools, Evaluation, Numbers, Timelines) professional development. It includes handouts for use in professional development planning. Figures and tables present: the traditional versus year-round calendar, essentials for best practice in professional development for sustained educational change, elements of successful professional development (content and process), a survey of elements of successful professional development, conditions for professional development, professional development processes (impact and use), balance and infusion of learning in professional practice, a survey on evidence of a culture, a causal loop with poor results, a matrix of teacher involvement, and a checklist on the potency of professional development. (SM)