摘要:Significant financial savings and the reduced share of illegal commercial proprietary software can be achieved through the introduction and use of Free and Open Source Software (FOSS) in primary education. By using FOSS, the latest information and communication technologies become available to everyone, regardless of their financial status. In this paper the authors explore the ICT teachers’ interest and their knowledge and use of free and open source software by participating in an on line questionnaire. Authors identify ICT teachers motivation factors - reasons for (e.g. it's free of charge, easy to obtain, quality) and against (e.g. already using commercial software, it's decreed to use commercial software, students textbooks are based on commercial software) the use of this software in teaching. The primary education computer classroom operating systems market share is also explored. This research was a part of main Scientific research named “Analytical Model for Monitoring of New Education Technologies for Long Life Learning“ conducted by Ministry of Science, Education and Sports of the Republic of Croatia (Registered Number 227-2271694-1699).