Known simply as Ms. Math to children across the country, Rachel McAnallen has devoted her life to sharing the joy and beauty of mathematics with learners of all ages. A professional educator for more than sixty years, she travels the globe teaching math at every grade level. In addition to her experience in the classroom, Rachel has served as a department chair, a school board member, and a high school administrator. A lifelong learner, Rachel received her Ph.D. from the Neag School at age seventy-five. She approaches the world around her with a boundless curiosity and a playful sense of humor that is reflected in her teaching style.