John SanGiovanni is a mathematics supervisor in Howard County, Maryland. There he leads mathematics curriculum, digital learning, assessment, and professional development. John also works as a graduate program coordinator for mathematics leadership at McDaniel College in Maryland. He is an author of more than twenty books featuring a wide range of mathematics education topics. John is a national consultant for curriculum development and professional learning. As a former Maryland Mathematics Teacher of the Year, he continues to be active in professional organizations recently serving on the Board of Directors for the National Council of Teachers of Mathematics and currently on the Board of Directors for the National Council of Supervisors of Mathematics.