In this article the authors present an update to Explorations, a program at Stanford University that allows undergraduates in an introductory biology course to explore specialized topics in the biological sciences while providing graduate students and postdoctoral scholars the unique opportunity to develop and teach single-session, research-focused classes. They provide an assessment of eight iterations of the program, using program attendance, student and instructor evaluations, senior exit surveys, course grades, and completion of undergraduate honors theses to assess the impact of the program on students and instructors.