Science Friday published an article commemorating the 20th anniversary of the first CubeSat launch on June 30, 2003. It’s a worthwhile article on the co-inventor, Jordi Puig-Suari, a brief tour of the CalPoly labs, and Darren Yui’s Spacecraft Engineering class at Grace Brethren High School in Simi Valley, CA.
From the final photo, I appears Mr. Yui is using AMSAT’s CubeSatSim in his class.