This chapter explores how music teachers may assess students in ways unique to music education while remaining open to using the components of teacher evaluation to improve their assessment practices. First, the chapter reviews how assessment is commonly part of teacher evaluation. Second, it briefly covers some critiques of the assessment aspects of teacher evaluation. Third, the chapter defines some common vocabulary and tenets used in assessment. These include assessment, evaluation, measurement, validity, triangulation, data, and formative and summative assessments. This vocabulary may help music teachers work through these critiques of assessment. Finally, the chapter provides specific ways music teachers might apply assessment vocabulary and tenets to the assessment components of teacher evaluation. This includes when teachers are required to create the assessments alone or in a group and when assessments are chosen or mandated by the district or state. Sample assessments are included in the chapter.