In order to achieve the most successful acquisition of knowledge and skills, the educational system offers content for students, followed by a monitoring process and finally, evaluation. The main function of grades should be to motivate students for their further advancement, and it is expected that this process reveals what the students are successful at, but also what they should focus on improving. In the theoretical part of this thesis, various terms are explained such as evaluation, testing and grading with an emphasis on grading methods, the role of the teacher in the evaluation process itself, the problem of teacher subjectivity, and the forms of evaluation of student success and forming a final grade. The research part of this thesis deals with examining the opinions of students and teachers of primary and secondary schools on assessment methods. The sample consisted of students and teachers of two secondary schools in Ivanić-Grad and Zadar, as well as two primary schools in Posavski Bregi and Ivanić- Grad. A survey questionnaire served as a research instrument with questions that were originally designed for the purpose of this work. The research results showed that students most often encounter written and oral methods of evaluating their knowledge and abilities, despite the fact that there are a large number of them who answered that they prefer projects and work activities more. Also, the vast majority of respondents (taking into account the students and the teachers themselves) emphasize the problem of exceeding the maximum daily workload of students through the teacher’s evaluation and grading. The obtained results indicate the necessity of introducing a wide range of changes in the school system itself in order to ensure a positive and encouraging atmosphere that would inspire and strive for further growth and to the progress of students at all levels of their individual personalities.