The research reported in this article follows-up on a study conducted by Anast-May, Buckner, and Geer (2010). The 47 interviewed principals identified three types of experiences school leadership interns needed in order to prepare them to lead school improvement efforts. This study explores interns' perspectives on the efficacy of their internship and whether the mentor principals helped them design internship activities that address the earlier study's three themes. The findings indicated that collaboratively designed internship activities provided useful experiences for the interns and ample, yet varied opportunities to address the three areas principals had identified in the previous study. [See previous study at EJ972878--"Redesigning Principal Internships: Practicing Principals' Perspectives," "International Journal of Educational Leadership Preparation," v6 n1 Jan-Mar 2011.]