Ethics in public service, and especially within the educational system, is a key element for preserving integrity and building trust among citizens towards the institutions that form the foundations of society. Teachers, professors and all employees in the education sector have an extremely important role in the upbringing and education of young people, who are expected to be highly professional and ethical in their work. Ethics in education implies constant respect for the rights of every student, transparency in evaluation, as well as fairness in the distribution of resources and the provision of educational opportunities. Educational workers must be aware of their role as role models, because their words and actions have a significant impact on the formation of attitudes and values among students. In addition, it is important to transparently manage potential conflicts of interest, which ensures the preservation of professional integrity and enables objective decision-making. As part of the preparation of the paper, empirical research was conducted in the Matija Antun Reljković High School, which includes two surveys with a sample of 77 adult students and 42 teachers and supporting staff members. Survey questionnaires were created in Google Forms, an online tool for creating forms, and distributed via the Microsoft Teams platform. Research on ethical principles in the educational system covered a wide range of topics that are of key importance for understanding and promoting ethical behavior in schools. The research results showed that there is awareness of ethical principles and rules of conduct, but also that there is room for improvement in education and communication of these principles. The collected data also indicated that students appreciate the openness and accessibility of teachers when it comes to discussing ethical issues, but also that there is a certain degree of indecision or conflict when it comes to reporting unacceptable behavior.