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.

Continuing his collaborative work with colleagues on what works best in teaching and learning, How Tutoring Works, Visible Learning in Early Childhood, and How Learning Works, all with Corwin Press, were released in 2021.

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.

Karen Flories was the Executive Director of Educational Services for 5 years and Director of Literacy and Social Studies for 2 years with Valley View School District in Illinois, after serving as the English Department Chair for Romeoville High School. Karen’s classroom experience includes high school English, special education, and alternative education. Karen holds credentials in general education, special education, and educational leadership. She earned her master’s degree in educational leadership from Concordia University. During her time at the district level, Karen led the implementation of Visible Learning+, specifically focusing on teacher clarity, classroom assessment, and feedback. Karen is the co-author of The PLC+ Activator’s Guide, PLC+: Better Decisions and Greater Impact by Design, and The PLC+ Playbook, Grades K-12. She is currently a full-time professional learning consultant for Corwin.