Recognizing the power of high quality practice in teacher preparation, a web-based simulation called Cook School District was designed to allow teacher candidates to practice the skills necessary to connect their teaching to the learning of all children employing the framework of teacher work samples (TWS). Pilot study data comparing simulation users' abilities to analyze hypothetical teaching scenarios, interviews, and reflective writing in real work samples suggest that the simulation plays a role in helping candidates become more aware of, and able to perform, several critical skills necessary to effectively connect teacher actions to the learning of each student. (Contains 2 tables, 3 figures, and 3 notes.)