CPERL group published 6 papers in the PERC proceedings
PERC papers have been published, and CPERL work has been featured extensively! Check out all the great articles:
Madden, J. H., Won, A. S., Schuldt, J. P., Kim, B., Pandita, S., Sun, Y., … Holmes, N. G. (2018). Virtual Reality as a Teaching Tool for Moon Phases and Beyond. In Adrienne Traxler, Ying Cao, & Steven Wolf (Eds.), Physics Education Research Conference 2018. Washington, DC. http://www.per-central.org/items/detail.cfm?ID=14819