Maria Litvin has taught computer science and mathematics at Phillips Academy in Andover, Massachusetts, since 1987. She is an Advanced Placement Computer Science exam reader and Table Leader and, as a consultant for The College Board, provides AP training for high school computer science teachers. Prior to joining Phillips Academy, Maria taught computer science at Boston University. She is a co‑author of several leading AP Computer Science textbooks, including C++ for You++ and Java Methods: Object-Oriented Programming and Data Structures. She is also a co-author of Be Prepared for the AP Computer Science Exam in Java (since 1999) and Mathematics for the Digital Age and Programming in Python. Since 2014, as a Code.org facilitator, Maria has trained over three hundred New England elementary school teachers in introducing computer science to children in grades K-5. She is the faculty advisor of the Coding Circle community service program at the local Boys & Girls Club and a co-author of the Continental Mathematics League computer science contests for elementary and middle school students.