This document discusses approaches to assessing the performance of K-12 students, educational leaders, and schools. It describes national and international assessments such as NAEP and TIMSS that test student performance in grades 4, 8, and 12. It also discusses methods for assessing school and leadership performance, including value-added measures, standards-based frameworks, and formative and summative evaluations. The types and purposes of student assessments are outlined, including standardized, norm-referenced, and criterion-referenced tests as well as formative and summative assessments. Technical issues like validity and reliability in assessments are also mentioned.