In 2003-04, 11 Wake County Public School System (WCPSS) high schools moved from a traditional student schedule of six full-year courses to a block schedule of four courses each semester (4x4). Implementation went fairly smoothly, with 90% of teachers trained prior to the change. Academic course opportunities and course enrollment numbers increased substantially (by 24% and 46% respectively) compared to 2002-03, key desired outcomes. Academic success was marked by increases in credits earned, grade promotion rates, and twelfth grade graduation rates as desired. Maintenance of prior status was desired for other outcomes this first year. End-of-course performance and grade point averages of 3.0 or higher actually increased slightly, while Advanced Placement (AP) scores of 3 and greater decreased slightly. Student attendance and suspension rates remained the same. Generally, most of those surveyed and interviewed expressed satisfaction with the change. Exploring modified schedule options for some courses as well as continued professional development are recommended. [David A. Martin, Steve Hauge, Richard Murphy, and Glenda Haynie contributed to this report.]