Steve Leinwand has been a national and international leader and change agent in K-12 mathematics for over 40 years. After eight years as a high school teacher, he served as State Mathematics Supervisor for the Connecticut Department of Education for 22 years with a portfolio of curriculum development, professional development, school improvement and assessment. Since 2002, Steve has been a Principal Research Analyst at the American Institutes for Research in Washington, DC where he has extended his work on curriculum evaluation, instructional quality, alternative forms of assessment and effective professional development. Steve served as President of the National Council of Supervisors of Mathematics and as a Board of Directors member of the National Council of Teachers of Mathematics. He is the author of numerous articles, several textbooks and Sensible Math and Accessible Math published by Heinemann.