The survey was conducted on a sample of 21 second to fourth grade pupils and five 2nd to 4th grade teachers at the First primary school in Petrinja. In addition to pupils and teachers, 1st to 3rd year students of the Faculty of Teacher Education in Petrinja were also included in this survey. The aim of the research was to determine the impact of student volunteering at the First Primary School on improving the teaching process in primary education. The impact that university students had on pupils was observed in written and verbal examinations, pupils’ attitudes to subjects and their own school responsibilities, as well as the learning process and pupils’ approach to solving tasks. The school teachers were asked to provide feedback on university students’ work, their attitudes regarding their own teaching and insight into their views on how lessons should be taught. Students were asked to self-assess their readiness to start teaching after they have spent time volunteering and the skills they have developed during that time, as well as their desire and motivation to work in the profession. All participants were interviewed twice, the first time during March, and the second time in May 2019. The obtained results showed that pupils were better at their oral exams after participating in the volunteering programme, they were more conscientious about school responsibilities, and they reported that working with students helped them improve their comprehension of the contents they were learning. Teachers expressed their satisfaction with the volunteering programme and stated that some of their pupils demonstrated progress in school after participation in the programme. The students expressed greater awareness of the problems teachers face in schools, and reported surprisingly low levels of knowledge among pupils, which they believe might be resolved if more creative and modern teaching approach is implemented with early primary school pupils.