The CIRTL NSF GRFLC is an NSF-funded Improving Undergraduate STEM Education (IUSE) initiative to broaden CIRTL’s national impact by supporting STEM teaching and learning professional development for GRFs. CIRTL network co-leaders from Drexel University, Adam Fontecchio and Jennifer Stanford, who are the Director and Co-Director of The Center for the Advancement of STEM Teaching and Learning Excellence (CASTLE), spearheaded this initiative.