Sharon Welch holds a B.S. in Physics and M.S. degrees in Physics, MechanicalEngineering, and System Dynamics and has worked at NASA for more than twenty-five years. During her NASA career she conducted research in optics, sensing, controls, and systems modeling. Realizing the importance of modeling and simulation in her work, beginning in 2007, she endeavored to bring modeling and simulation into U. S. middle and high school classrooms. She worked with scientists and engineers and K-12 and university educators to conduct a series of workshops designed to teach modeling and simulation methods to middle school and secondary school science and math teachers. Many of the lessons from these workshops, including lesson plans created by the teachers themselves are now incorporated in a FlexBook.