Dave Nagel, MsED, is an international educational consultant and researcher. Dave began his educational career as a middle school science and high school biology teacher. His administrative experiences involved middle school assistant principal, high school associate principal, and director of extended day and credit-recovery programs. He was honored numerous times as a ‘Senior Choice’ winner, where graduating seniors selected him as someone who dramatically affected their life in a positive way. Dave has credentials in school leadership and secondary science teaching as well as a master of science degree from Butler University. Dave is the author of Effective Grading Practices for Secondary Teachers and the co-author of The PLC+ Activator’s Guide and PLC+: A Playbook for Instructional Leaders.

Douglas Fisher, Ph.D., is professor and chair of educational leadership at San Diego State University and a leader at Health Sciences High and Middle College. Previously, Doug was an early intervention teacher and elementary school educator. He is the recipient of an International Reading Association William S. Grey citation of merit and an Exemplary Leader award from the Conference on English Leadership of NCTE. He has published numerous articles on teaching and learning as well as books such as The Teacher Clarity Playbook, PLC+, Visible Learning for Literacy, Comprehension: The Skill, Will, and Thrill of Reading, How Tutoring Works, and How Learning Works. Doug loves being an educator and hopes to share that passion with others.

Toni Faddis, EdD, is a Corwin author and full-time professional learning consultant. Toni was previously a bilingual teacher and Reading Recovery specialist in elementary and middle schools, as well as a principal in San Diego. In addition, Toni served as a district central office leader responsible for equity, access, and leadership development throughout the largest elementary school district in California. She holds teaching and administrative services credentials in California and earned her doctoral degree in educational leadership from San Diego State University. Toni also mentors and coaches current and aspiring school leaders in the Educational Leadership Department at San Diego State University. Toni is the co-author of PLC+: A Playbook for Instructional Leaders, Collaborating Through Collective Efficacy Cycles, and The Ethical Line.

Aida Allen-Rotell, MA, is currently a full-time professional learning consultant for Corwin and a teaching clinician. She was previously a bilingual teacher in an elementary school, where she taught grades K-6 for 15 years, as well as a high school special educator, academic coach, coordinator of services for multilingual learners, and administrator. She holds teaching and administrative services credentials in California and earned her master’s degree in education from San Diego State University. She led efforts to improve student learning, which resulted in her school earning academic distinction for impacting the lives of students living in poverty, becoming a Visible Learning+ Gold Certified school, and improving academic language for multilingual learners. She also served as an advisor to many high school clubs, was the student government advisor, and led students to championships for 10 years in Health Occupations Students Association (HOSA) competitions. She is dedicated to developing teacher and leadership mindsets for diverse learning populations. Aida is the co-author of PLC+: A Playbook for Instructional Leaders.