Do you feel frustrated when designing theme-based, interdisciplinary curricula for high-ability students? Try using the Purdue Three-Stage Model (PTSM) and experience the smooth flow from teacher-directed instructions to teacher-facilitated activities, and finally to students’ independent learning stage! Above-grade level materials and hands-on activities centered on Ancient Civilizations and Ecological Systems within condensed instruction hours are shared. Student evaluations of their involvement in the unit are also shared. Participants learn how to develop their own curricula used either in gifted education settings or in differentiated classrooms by effectively using the PTSM.