Ruth Harbin Miles coaches rural, suburban, and inner-city school mathematics teachers. Her professional experience includes coordinating the K–12 Mathematics Teaching and Learning Program for the Olathe, Kansas, public schools for more than twenty-five years; teaching mathematics methods courses at Virginia’s Mary Baldwin University; and serving on the Board of Directors for the National Council of Supervisor’s of Mathematics, The National Council of Teachers of Mathematics, and the Kansas Association of Teachers of Mathematics. Ruth is a coauthor of thirty-seven books, including eleven Corwin publications. As an International Fellow with the Charles A. Dana Center, Ruth worked with classroom teachers in Department of Defense Schools, helping them implement College and Career Ready Standards. Developing teachers’ content knowledge and strategies for engaging students to achieve high standards in mathematics is Ruth‘s specialty.