Investigation means that researchers collect the relevant information of the research object purposefully and systematically through questionnaires and interviews, and sort out and analyze the first-hand information obtained, so as to reveal the nature and laws of things and seek solutions to practical problems.

The types of educational investigation methods are mainly divided into:

According to the selection range of respondents, it can be divided into general survey, sampling survey and case survey. General surveys are also called comprehensive surveys, such as the current survey of students' weariness of learning. Sampling survey, that is, selecting some units (samples) from the whole range (population) of the investigated object for investigation, and inferring the eigenvalue of the population from the eigenvalue of the sample. Case investigation refers to the conscious selection of an educational phenomenon or educational object for investigation and description on the basis of concrete analysis of the educational phenomenon or educational object being investigated.

According to the survey content, it can be divided into status survey, related survey, development survey and forecast survey. Investigation on the current situation of students' weariness of learning. Correlation investigation is mainly to investigate the nature and degree of two or more educational phenomena, and to analyze whether there is correlation and mutual change between them. The purpose is to find out the relevant factors of an educational phenomenon and explore ways to solve the problem. Development survey is to investigate the characteristic changes of educational phenomena in a long period of time in order to find out the changes and differences before and after. The survey is difficult to predict and the accuracy of the results is relatively low.

According to the methods and means of investigation, investigation can be divided into questionnaire, interview, measurement and questionnaire. Questionnaire survey is a research method to collect data through written questions. Interview survey refers to a research method in which researchers collect information in the form of oral questions and answers by talking face to face with subjects. Measurement survey refers to a method of measuring the actual situation of an educational phenomenon with a set of test questions, so as to collect data for quantitative research. Questionnaires are mainly used to collect various forms of factual information, especially data.

The above is the investigation method in the research method of educational science, and there is a lot of knowledge to understand and remember.