Abstract: In the blended teaching of physical chemistry, evaluation is a crucial part, and it will guide students to plan how to learn the course. Therefore, the comprehensive use of online and offline teaching resources, the construction of the evaluation system of physical chemistry by blended teaching, evaluation design as one of the learning activities, has played a positive role in improving students'independent learning ability, thinking visualization ability, and innovation ability. This paper discusses the impact and significance of the evaluation process on students'learning effect from five aspects:“why evaluate?”,“what evaluate?”,“how to evaluate?”,“who evaluate?”and“when to evaluate?”.

Key words: Physical chemistry, Blended teaching, Learning effectiveness, Evaluation content, Evaluation methods, Evaluation subject