John SanGiovanni is a mathematics educator, author, and consultant with extensive experience in curriculum development, professional learning, and leadership in mathematics education.

Currently serving as a district math leader in Maryland, John oversees mathematics instruction across a large and diverse school system. His work includes leading professional learning, mentoring math instructional coaches, supporting school improvement planning, and designing curriculum and assessments to advance high-quality math teaching and learning for all students.

John is passionate about developing and supporting new mathematics teacher leaders in his district and beyond. He is the former Graduate Program Coordinator of Elementary Mathematics Instructional Leadership at McDaniel College, and has also served as an adjunct professor at Towson University and Mount Saint Mary’s University. In these roles, he has taught mathematics methods and leadership courses, helping teachers grow their instructional practice.

A prolific author, John has written numerous books on mathematics teaching and learning, including the Figuring Out Fluency series, the Daily Routines to Jumpstart Math Class series, the Math In Practice series, and Productive Math Struggle. His work focuses on fluency, problem-solving, and mathematical understanding, offering practical strategies for educators. Additionally, he is a lead advisor and author for McGraw-Hill Education’s Reveal Mathematics programs for elementary and middle school.

Beyond his district and academic roles, John is a national leader in mathematics education. He has served on the Board of Directors and numerous guidance committees for the National Council of Supervisors of Mathematics (NCSM) and the National Council of Teachers of Mathematics (NCTM). He is also an independent consultant, providing professional learning and curriculum design services across the United States and Canada.

With a passion for improving mathematics instruction, John continues to support teachers, coaches, and administrators in creating meaningful and effective math learning experiences for students.