(1) to spur and promote students' learning;

(2) It is the main way for schools to identify students' academic achievements and parents to understand students' learning situation;

(3) It is an important part of the teaching process;

(4) As the basis for educational evaluation and decision-making.

Content introduction:

Educational measurement and evaluation is one of the three major fields of educational science research in the world today. Chemical education measurement and evaluation is a process of qualitative and quantitative description or value judgment of chemical education activities and effects by systematically investigating, comparing and collecting data and applying the principles and methods of educational measurement.

In order to understand the significance of educational measurement and evaluation more comprehensively and deeply, it is necessary to look at the position and role of educational measurement and evaluation in the education system from the perspective of system analysis. Because educational activities are "the unity of society, psychology and control", these three factors can constitute the most basic three subsystems of the educational system.

Namely, target system, behavior system and control system. The educational goal is the educational quality standard that teachers (educators) and students (educatees) should reach together through educational activities, and it is the basic basis for guiding teachers and students to carry out teaching activities. The organic combination of educational goals in all stages of the educational process constitutes the educational goal system and is the embodiment of educational goals.

The goal system embodies the social components in the education system, which determines the teaching of teachers and the learning of students from three aspects: direction, task and content. Behavioral system refers to the process that teachers and students realize educational goals through the interaction of mind and information, and the whole composed of various psychological factors and educational means that affect this process.

It contains the psychological elements in the education system. The interaction between teachers and students to achieve educational goals is realized through this system. Control system refers to the best combination of various educational means and methods necessary to control the educational process in order to achieve educational goals.

The system contains control components in the education system. Because all control processes are processes of selecting various possible states of the system in the state space according to certain goals, the system reaches or approaches the selected states. Before choosing, we must first determine the spatial state of the education system at different times. This process is actually the process of education measurement and evaluation. Therefore, educational measurement and evaluation can be regarded as the main factors in this system.