A new web-based tool will offer far greater ease and clarity for state and district leaders seeking to set learning goals and measure progress under the sweeping Every Student Succeed Act. The tool, called the Student Growth Simulator, was developed by Chiefs for Change, researchers at the Johns Hopkins School of Education, and Tembo, an education technology firm. The Every Student Succeeds Act (ESSA) passed in December 2015, replaced the No Child Left Behind Act, and requires that every state establish in their educational policies ambitious long-term goals and measurements of interim progress for academic achievement, graduation rates, and English-language proficiency. Goals must be set for all students and for each subgroup of students, so that the lowest-performing subgroups make the greatest progress.