About the Authors

Dr. John Hattie

has been Professor of Education and Director of the Melbourne Education Research Institute at the University of Melbourne, Australia, since March 2011. He was previously Professor of Education at the University of Auckland, University of North Carolina, and University of Western Australia. His research interests are based on applying measurement models to education problems. He is president of the International Test Commission, served as adviser to various Ministers, chaired the NZ performance-based research fund, and in the last Queen’s Birthday awards was made “Order of Merit for New Zealand” for services to education. He is a cricket umpire and coach, enjoys being a dad to his young men, is besotted with his dogs, and moved with his wife as she attained a promotion to Melbourne. Learn more about his research at www.corwin.com/visiblelearning.

Douglas Fisher, PhD,

is Professor of Educational Leadership at San Diego State University and a teacher leader at Health Sciences High & Middle College. He holds a master’s degree in public health with an emphasis in research methods and biostatistics and a doctoral degree in multicultural education. He has been an early intervention teacher, elementary teacher, health educator, and administrator in California.

Nancy Frey, PhD,

is Professor of Educational Leadership at San Diego State University. The recipient of the 2016 Thought Leader Award in Adolescent Literacy from the International Literacy Association, she is also a teacher-leader at Health Sciences High & Middle College and a credentialed special educator and administrator in California.

Linda M. Gojak, MEd,

is a past president of the National Council of Teachers of Mathematics. At Hawken School in Lyndhurst, Ohio, Linda chaired the K–8 mathematics department and taught Grades 4–8 mathematics. In her work as director of the Center for Mathematics and Science Education, Teaching, and Technology (CMSETT) at John Carroll University, she planned and facilitated professional development for K–12 mathematics teachers. Linda has been actively involved in professional organizations including the Mathematical Sciences Education Board, the Conference Board of the Mathematical Sciences, the Council of Presidential Awardees in Mathematics, and the MathCounts Board of Directors. She has served as president of the National Council of Supervisors of Mathematics and president of the Ohio Council of Teachers of Mathematics. Among her recognitions are the Presidential Award for Excellence in Mathematics and Science Teaching and the Christofferson-Fawcett Award for lifetime contribution to mathematics education.

Sara Delano Moore, PhD,

is an independent educational consultant at SDM Learning. A fourth-generation educator, she focuses on helping teachers and students understand mathematics as a coherent and connected discipline through the power of deep understanding and multiple representations for learning. Her interests include building conceptual understanding of mathematics to support procedural fluency and applications, incorporating engaging and high-quality literature into mathematics and science instruction, and connecting mathematics with engineering design in meaningful ways. Sara has worked as a classroom teacher of mathematics and science in the elementary and middle grades, a mathematics teacher educator, Director of the Center for Middle School Academic Achievement for the Commonwealth of Kentucky, and Director of Mathematics & Science at ETA hand2mind.

William Mellman, EdD,

has been a math and science teacher, vice principal, instructional leader, and program director who oversaw the mathematics department at Health Sciences High & Middle College, which he turned into an exemplar that other school districts and teachers strive to emulate. He currently serves as an elementary school principal in National City, CA, where he has significantly raised student achievement.