This research examines middle school mathematics pre-service teachers' professional development during two years of their study at a teacher college regarding their perceptions of ICT use in their teaching of mathematics, specifically as a result of their preparation in ICT integration in the mathematics classroom in the frame of two didactic courses (in their second year of study) and in the frame of practicing teaching mathematics with technological tools (in their third year of study). The results indicated that generally, the pre-service teachers, as a result of their two years preparation, perceived the importance of integrating diverse technological tools in the mathematics classroom, probably because of the visual aspect of mathematics that the technological tools enable, which helps students with their learning of mathematics and encourage them to do so because they are part of their lives.