In this talk, Craig Zilles, Associate Professor and Education Innovation Fellow at the University of Illinois at Urbana-Champaign, discusses an effective, secure, and efficient alternative to traditional pencil-and-paper exams that scales to even the largest courses. The College of Engineering at the University of Illinois has been running a Computer-Based Testing Facility (CBTF) for more than six years and have been running at scale (e.g., 35+ courses, 75,000+ exams/semester) for the past several years. The CBTF is a proctored, "locked-down" computer lab that is operated as a service to courses. The CBTF has changed how they teach, leading to improved student learning and enabling the introduction of more project and group work in large STEM classes, because graduate TAs are freed from routine proctoring and grading. Zilles discusses the basic operation of their CBTF and the key components that make it work. He presents findings on aggregate student behavior in the CBTF and data on increased learning gains and reduced failure rates in specific courses. He also discusses mechanisms and policies for maintaining security, supporting testing accommodations, and minimizing faculty disruption. Finally, he touches upon the pieces of the CBTF strategy that they have used for the transition to online exams resulting from Covid-19. This webinar is part of our Learning@Scale series. Speaker Craig Zilles Associate Professor & Education Innovation Fellow University of Illinois at Urbana-Champaign