The teaching of primary school mathematics is greatly oriented towards the development of basic mathematical literacy and cognitive skills such as remembering, understanding and applying (according to Bloom's revised taxonomy). Nowadays, it is very important to implement teaching methods that are motivating for children and lead to more effective teaching and learning. The use of digital technology such as interactive boards, tablets and smartphones with suitable software and applications is appropriate for children in this digital age. This contribution intends to point out the possibilities of GeoGebra software as an effective tool for teaching mathematics for children between 9 and 11 years of age. We created and circulated a questionnaire to determine the use of technology by primary education teachers in Slovakia and Hungary, and their opinions and experience concerning GeoGebra software. We will also show the results of the qualitative research through which we studied the possibilities of teaching geometry by using GeoGebra.