All trainee teachers of Shahid Bahonar teacher training center of Hamadan, Iran, were selected as the research population in 2011 academic year. Among them, two groups of female elementary education trainee teachers, at 19-21 age level, were selected as available sample that 25 participants were placed in the experimental group and 24 participants were placed in the control group randomly (They were not aware that they were participating in a research project). All participants had almost the necessary skills to use computers, and they received education for methods of teaching mathematical concepts by the same instructor.