Josepha Robles is a coauthor of Introduction to Reasoning and Proof (Grades PreK–2 and 3–5), part of Heinemann’s Math Process Standards Series. She has taught for more than twenty-five years in public and private schools. She is a math content coach in Montgomery County, Maryland, a math consultant in the private sector, and a published author who has presented at NCTM national, regional and state conferences.