Curriculum evaluation is the process of assessing the worth, quality, and effectiveness of educational programs using various models such as Tyler's, CIPP, and Stake's models. The evaluation involves collecting information for decision-making regarding maintaining, modifying, or eliminating curricula, and it can include both formative and summative assessments. Key evaluation aspects involve context, input, process, and product phases and can be conducted through methods like observations, interviews, and performance tests.