Pérsida Himmele, PhD, is a professor of language and literacy at Millersville University in Pennsylvania. She is a former elementary and middle school teacher and the co-author of several ASCD books and resources, including the quick reference guide Planning Effective Instruction for ELLs and the bestselling book Total Participation Techniques.

William Himmele is an associate professor at Millersville University in Pennsylvania. He has served as an ESL teacher and a speech pathologist, a higher education administrator, an international consultant, and a speaker on issues related to increasing student engagement and teaching English language learners.

Himmele also served as the coordinator for the graduate ESL teacher certification program at Millersville University and has been an educational program consultant for several schools in various countries seeking to improve their school programs.

His is coauthor with Pérsida Himmele of Total Participation Techniques: Making Every Student an Active Learner and Total Literacy Techniques: Tools to Help Students Analyze Literature and Informational Texts.