Authors & Presenters

Eric Twadell, PhD, is superintendent of Adlai E. Stevenson High School in Lincolnshire, Illinois. He has been a social studies teacher, curriculum director, and assistant superintendent for leadership and organizational development.

Susan Udelhofen, PhD, has 15 years of experience as a consultant. She provides professional development on some of the most relevant topics in education, including the Common Core, assessment, and school improvement.

Katie Upshaw is a preschool special education teacher in the Metuchen School District in New Jersey. Additionally, she also serves as a union representative, chairs the school leadership team, and engages in district committees.

Javier Vaca is a teacher and instructional coach at Health Sciences High and Middle School in California. He previously served as an elementary school teacher and a reading intervention specialist.

Jorge Valenzuela, PhD, is a respected education and performance coach, author, and speaker at Lifelong Learning Defined. He supports educators through training in high-impact strategies, STEM, PBL, AI, and entrepreneurship to boost instruction and lead with purpose.

Mark Van Clay, EdD, is an educational presenter who specializes in aligning school systems. He also works with the Consortium for Educational Change and has 30 years of experience in education.

Thomas Van Soelen, PhD, is a professional development trainer and leadership coach. His areas of expertise include instructional strategies, learning communities, critical friendship, leadership development, and teacher evaluation.

Jonathan G. Vander Els specializes in supporting teachers and administrators in schools and districts across the country in developing, sustaining, and enhancing structures to support all learners.

Natalie is an educator, coach, speaker, and passionate learner. Driven to make education empowering for all, she has developed expertise in equitable assessment and grading practices and can break down complex topics into practical strategies to drive school improvement.