This study evaluated the effect of a pilot Pre-AP® Science Vertical Team Summer Institute on teacher practices and perceptions of the program. The overarching goals of the Vertical Teams Institute were focused on the tools needed to build or strengthen an AP® Vertical Team and to align science curriculum across grade levels. The evaluation also surveyed a sample of the initial attendees one year after the institute to assess their perceptions of the institute and practices in the classroom following a year of implementation in the school. Results included: (1) 61% of the respondents did not have Vertical Teams in their district at the time of the training, but planned to introduce them in the future; (2) 91% of the respondents indicated that they would change their instructional practices to emphasize certain content, and 95% indicated that they would change their classroom activities; (3) 75% of the respondents indicated that what they learned would better prepare their students for the rigors of AP; (4) 86% indicated that the strategies and tools they were exposed to would improve student access to the AP program; (5) After one year of implementation, there was no significant reduction in the perceived utility of the institute; (6) After one year of implementation, there was no significant reduction in perceived impact of the institute on teacher practice.