Evaluation is used for various purposes including placement, promotion, grouping, diagnosis, remediation, instruction, administration, guidance, development, and research. Specifically, evaluation helps determine student placement in classes, decide whether students will be promoted to the next grade or class, group students according to ability and needs, diagnose student weaknesses, identify remedial actions, improve instructional methods, inform administrative decisions, provide guidance to students, facilitate student and program development, and generate data for educational research.