Lydia Stack is an international English Language Teacher Educator who provides training on Teaching English to Young Learners (K–12). Her experience includes 25 years as an elementary (K–8) English as a Second Language (ESL) teacher and high school (9–12) ESL department head. She also coordinated ESL professional development and secondary ESL programs for the San Francisco School District. From 1992–1997 she coordinated the Mentor Teacher Program and she wrote the first Beginning Teacher Support and Assistance Grant (BTSA). In 1991–1992, she was President of TESOL. Her awards include the an Exceptional Educator award from the California Lottery and Legislature (2005), Heinle Lifetime Achievement Award (2004), the TESOL James E. Alatis Award (2003) for outstanding service to the English as a Second Language Teaching profession, the CATESOL Sadie Iwataki Leadership Award (1991), and the San Francisco STAR Teacher Award (1989). Lydia Stack is co-author of Rigby On Our Way to English and Holt McDougal Literature. She received her BA in Sociology from Dominican College, San Rafael, and her MA in Education from California State University.