Mario Herrera, an English teacher for 25 years, does research and experimentation on how to teach English overseas more effectively. He is coauthor of the primary EFL series Parade, as well as of the preschool EFL series Balloons, and the high-elementary/middle school series My Friends and Teen Zone. As an international consultant, Mr. Herrera has traveled the world on behalf of Pearson Education, directing seminars and in-service training sessions throughout the Americas, Europe, the Middle East, and Asia.

Diane Pinkley is former Director of the TC TESOL Certificate Program at Teachers College, Columbia University in New York. She has trained teachers and presented academic papers at conference around the world for more than 25 years, and has written textbooks for both children and adults, among them On Target, In Charge, Parade, Letters to Parents ESL, and Spin. Formerly the Director of the Institute of North American Studies in Badalona, Spain, and Curriculum Coordinator at the Michigan Language Center in Ann Arbor, Michigan, she has taught all levels of ESL/EFL.