Abstract
School districts throughout California will soon need to decide which curriculum course model to adopt for high school science. This article provides an overview of four potential course models for high school. Regardless of the course model eventually selected, to achieve the NGSS goal of “All standards, All students,” we highly recommend that California school districts adopt a 3-year science graduation requirement. If the NGSS are intended to improve science education and prepare all students for college and career, it cannot be done effectively or equitably if only two years of science are required for high school graduation.