Educational evaluation is mainly a process of evaluating and improving students, teachers, curriculum and educational system. From the purpose and perspective of evaluation, educational evaluation can be divided into the following categories:

1. Summative evaluation:

Summative evaluation is a kind of comprehensive evaluation of educational activities. Its purpose is to review and summarize the effect and influence of educational activities, so as to draw a comprehensive evaluation conclusion on the quality of the whole education system. This evaluation usually adopts a combination of quantitative and qualitative methods, covering various indicators and dimensions.

2. Formative assessment:

Formative evaluation is an evaluation that continuously records and feeds back students' learning process. Its purpose is to understand students' learning progress, help them improve their learning methods and improve their academic performance. Formative evaluation emphasizes the guidance and support for students and the monitoring and adjustment of learning dynamics.

3. Diagnostic evaluation:

Diagnostic evaluation is an evaluation to identify and solve students' learning problems and obstacles. Its purpose is to help students find the difficulties in learning, find the root of the problem, and provide corresponding help and support. Diagnostic assessment focuses on individual students' learning needs and adjusts teaching and learning strategies accordingly.

4. Target-oriented assessment:

Goal-oriented evaluation is a kind of evaluation type to evaluate the degree to which students achieve the expected goals. Its purpose is to test whether students have reached the preset learning results with the learning goal as the guide. Goal-oriented evaluation focuses on students' mastery of knowledge and skills, and compares the evaluation results with preset standards.

5. Social evaluation:

Social evaluation is a kind of evaluation type that evaluates education from a social perspective. Its purpose is to evaluate the impact of education on social development and civic literacy. Social evaluation focuses on the social benefits and achievements of education, including the evaluation of students' sense of social responsibility, civic awareness and social participation ability.

In a word, the purpose of educational evaluation is varied, which can be divided into different types according to the evaluation object and evaluation angle. Different types of evaluation have played an irreplaceable role in education reform and improving education quality.