How important is a high-quality curriculum? A school without a quality curriculum is like a car without an engine--neither goes anywhere. One responsibility of a school administrator is to ensure that quality curriculum is designed, adopted, and implemented. The No Child Left Behind act (NCLB) has focused the attention of an entire nation on the curriculum of an individual district, and educators are keenly aware of this external scrutiny. If curriculum is the engine that drives teaching and learning, then the curriculum improvement process becomes the tune-up for that engine through planning, developing, implementing, and evaluating the curriculum. This article discusses a comprehensive review curriculum. It should include a plan for evaluating the validity, implementation, and effectiveness of the curriculum. To keep the curriculum engine running smoothly, regular tune-ups must be performed by highly-trained personnel who can diagnose engine problems before they lead to an actual breakdown. With careful attention, quality curriculum can motivate teachers, inspire students, and contribute to the highly effective education desired by all.