For 25 years, Staff Development for Educators (SDE) -- the leading provider of professional development training, seminars and conferences, and educator resources -- has served the professional development needs of districts, schools and educators from across the country and around the world by giving teachers an opportunity to learn the best techniques from the best teachers and thought-leaders in K–12 education.  Each year, countless administrators and teachers learn real classroom strategies and practical, proven techniques through regional seminars, national conferences, on-site consulting services and online learning programs.