The correct answer is: D. How to deal with students and everyday class situation
Educational psychology is a field that studies how people learn and how to improve teaching methods. It can be used to help teachers understand their students better and to develop effective teaching strategies.
Option A is incorrect because research procedures for evaluating current teaching procedures are not the main function of educational psychology. This is a task that is more likely to be carried out by educational researchers.
Option B is incorrect because insight into the needs, problems and styles of behaviour of teacher is not the main function of educational psychology. This is a task that is more likely to be carried out by educational psychologists who are working in the field of teacher education.
Option C is incorrect because insight into various aspects of modern teaching education is not the main function of educational psychology. This is a task that is more likely to be carried out by educational researchers or by teacher educators.
Therefore, the correct answer is: D. How to deal with students and everyday class situation