The integration of problem-based learning and ICT in this study had some advantages. It led the students-teachers to learn better the mathematical concepts of elementary schools and apply them better in practice; some of the students who were less interested in classroom activities could play a more active role in the classroom by this integration, since working with computers was pleasant to them. Problem-based learning also involved trainee teachers in problem solving as a result of which they could learn mathematical concepts and methods of teaching them better. Students in the experimental group during the procedure had a good feeling and were being fully engaged to show a proper method of teaching mathematical concepts, and they were discussing and receiving feedback from the teacher-trainer. In interviews with the researcher, they described the learning environment desirable and pleasant and offered to use this method in other classes, too. They expressed their satisfaction, and commented that many of their problems had been solved during the procedure and had gained a deep understanding of mathematical concepts in elementary level. Another advantage of integrating ICT and problem-based learning was that trainee teachers became familiar with practical applications of computers in education, and this may lead to using this method properly in their classes in the future.