National governments and internationalagencies recognize the key role of student assessment inbuilding an effective education system. The assessmentsprovide information on whether all students in an educationsystem are learning, and how well. Without good assessmentinformation, it is impossible to know whether asystem's policies and practices are working or how theymight be changed.SABER-Student Assessmentdocuments and analyzes the quality of student assessmentsystems to help countries generate and use better assessmentdata. The goal is to expand the scope and quality oflearning for all. More than 30 countries at different levelsof development have applied SABER-Student Assessment toevaluate the quality of their assessment systems and enactreforms to strengthen them. Many low- and middle-incomecountries have a strong commitment to improving theirassessment activities, but they will need sustained supportand commitment from the international community to ensurethat the changes take hold. Evidence-based tools such asSABER-Student Assessment can help countries generate and usebetter assessment data to expand the scope of learning forall students.