This diploma paper researches the use of information and communication technology in the teaching process of subject teaching. The rapid development of recent technology has resulted in innovations that can be implemented for the purpose of teaching improvement. The paper begins with the information and communication technology concept definition. There follows the explanation on the use of information and communication technology in teaching process improvement, as well as of the terms such as information and computer literacy, e-learning and m-learning, web 2.0 tools, and the use of robots in teaching. The following chapter focuses on the projects „Škola za život“ and „e-Škole“ aiming at digitalization of educational institutions in the Republic of Croatia. Furthermore, the paper deals with the general meaning of the terms competence, a competent teacher in technological and pedagogical sense of the term. Additionally, different usages of computers and digital educational content in teaching will be described, giving concrete examples of using different software tools, websites and applications in particular subjects such as informatics, mathematics, Croatian language, chemistry and foreign language like English language. Also, an analysis of the digital educational content found in the digital educational content repository called „Edutorij“ will be described. The paper describes the ways information and communication technology contribute to working with students with special needs e.g. gifted students and students with disabilities. In addition, the advantages and disadvantages of using information and communication technology in teaching will be listed. Finally, an analysis and research results will be presented with an aim to determine the extent at which subject teachers use technology and the contents within the teaching process; it presents teachers' personal attitudes towards the use of information technology. The research will be conducted among subject teachers in primary schools in the Republic of Croatia by means of a questionnaire.