Douglas Fisher, Ph.D., is Professor of Educational Leadership at San Diego State University and a leader at Health Sciences High & Middle College. He has served as a teacher, language development specialist, and administrator in public schools and non-profit organizations, including 8 years as the Director of Professional Development for the City Heights Collaborative, a time of increased student achievement in some of San Diego's urban schools. Doug has engaged in Professional Learning Communities for several decades, building teams that design and implement systems to impact teaching and learning. He has published numerous books on teaching and learning, such as Assessment-capable Visible Learners and Engagement by Design. Nancy Frey, Ph.D., is a Professor in Educational Leadership at San Diego State University and a leader at Health Sciences High and Middle College. She has been a special education teacher, reading specialist, and administrator in public schools. Nancy has engaged in Professional Learning Communities as a member and in designing schoolwide systems to improve teaching and learning for all students. She has published numerous books, including The Teacher Clarity Playbook and Rigorous Reading. Olivia Amador is a Professional Learning Consultant with Corwin. As an award-winning elementary school principal, former bilingual teacher, and reading and language arts specialist, her area of focus and expertise is in creating a culture of learning connected to high-impact practices, English language development, teacher collaboration, and leadership development. Joseph Assof is an 11th and 12th grade mathematics teacher and the math department chair at Health Sciences High and Middle College in San Diego, CA. He leads his department's reform efforts to align to the Common Core Standards - with a focus on high quality instruction. He is a member of the San Diego County Math Leaders Task Force, whose mission is to support every student in meeting the rigorous expectations of the Common Core. Joseph's classroom is featured in a number of Visible Learning for Mathematics, Grades K-12 videos.