John DeLandtsheer has served as the GATE Coordinator in the Redlands Unified School District for sixteen years. He has recently retired from his role as principal of Mariposa Elementary but continues to teach at UC Riverside and serve as the GATE Coordinator in Redlands Unified School District. He is a private consultant and trains GATE teachers and others throughout California and the west in differentiated curriculum through his company, JD Seminars. DeLandtsheer has a master's degree in school administration and has devoted over thirty-five years of his educational career to gifted students at the district, county, and state levels. He has served on the board of directors for the California Association for the Gifted and he currently in their GATE Certificate Program. He is a frequent presenter at state and national conferences.