Geoffrey Challen

Geoffrey Challen is a Teaching Professor in the Department of Computer Science at the University of Illinois. His focus is on scalable computer science education, particularly in introductory courses like CS 124 (formerly CS 125). He holds a PhD and AB in Computer Science and Physics from Harvard University.

His research interests center on computers and education, emphasizing innovative teaching methodologies and EdTech tools. He has developed widely-used platforms like learncs.online and Jeed, which support interactive learning environments. His NSF CAREER Award (2017) recognizes his work in educational technology and course design.

Challen’s articles explore topics including automated assignment grading, student preferences in large courses, and mobile systems optimization. His courses have enrolled over 8,962 students, with recent innovations like Kotlin language integration and diverse instructor profiles in course materials.

Award Highlights:

• National Science Foundation CAREER Award (2017)

Teaching & Mentoring: He has mentored over 2000 undergraduate/graduate staff, led curriculum revisions, and pioneered asynchronous online teaching formats. His lab focuses on training future computer scientists through project-based learning and collaborative environments.