This document discusses key concepts in educational measurement, assessment, and evaluation. It defines tests as instruments used to measure samples of behavior through questions with right/wrong answers. Measurement is assigning numbers to quantify how much a learner has learned. Assessment involves gathering and evaluating evidence of student achievement through tests and other tools. Evaluation is the process of making judgments about the worth or value of performance, including comparing results to objectives. The purposes of educational testing include instructional assessment, curriculum decisions, selection, placement, and personal assessment. Principles of good assessment include addressing learning targets, providing feedback, using a variety of procedures, and ensuring validity, reliability, and usability. Modern assessment is objective-based, reliable, multidimensional, and