Many researchers and policymakers posit improving the quality of the nation's teaching workforce is the best intervention for raising student achievement and providing opportunities to all students. However, interventions that result in consistent improvement for teacher practices and translate into improvements in student achievement are rare. A growing evidence base on the TAP System continues to demonstrate the TAP's power to transform schools. This study examines 66 TAP System schools and, using statistical controls, compares them to the state average as well as a matched comparison group to determine the impact on student achievement. Results indicate the TAP System school students consistently and significantly outperform their matched school peers.