The briefs in the NES Evaluation Briefs series provide updates on evaluation results relevant to the design, implementation, and impact of the NES program. This Brief highlights how the program was implemented in Year 1. The Brief provides contextual information about participating schools, organizational approaches to participation, strategic planning, professional development supports, and impact on teachers and schools. In 2003 the NASA Explorer School (NES) program was launched nationally with the participation of 50 school teams. Designed as a three-year partnership with schools, the goal of the NES program is to help middle schools improve teaching and learning in science, technology, engineering, and math through significant structural (e.g., professional development, stipends) and curricular supports based on NASA's resources. The research and evaluation team of the Classroom of the Future is conducting the evaluation of the NES program. The goal of the evaluation is to document the design decisions that NASA and participating schools make throughout the program as well as the impact of those design decisions on the program objectives. This brief provides an update on program progress at the end of Year 1 of the program. [Brief was produced by NASA-sponsored Classroom of the Future[TM], Center for Educational Technologies[R], Wheeling Jesuit University.]