In Japan, the school children with development disabilities who attend ordinary classes are estimated to account for six percent. Meanwhile, the reasonable accommodation utilizing information and communication technologies (ICT) in education is required. The authors developed a training program for two days targeting the teachers of ordinary schools and discussed its effects. The contents of the training program are concerning how to use ICT in education. The program contains four items of A (practical use of ICT in the preparation of classroom teaching), B (teaching using ICT), C (instruction of the use of ICT) and D (Practical use of ICT for education for the developmentally disabled). Items from A to C were established by the Ministry of Education, Culture, Science and Technology and item D contains the contents of education for those with development disabilities that were set up by the authors Sixteen teachers participated in this training workshop. The effects of the training program were discussed based on 14 respondents to the questionnaires implemented for the workshop for two days. The questionnaires consisted of four sub-items for each item and one sub-item was surveyed using the four-point scale. The perfect score of each item was 4 sub-items x 4-point scale=16. The questionnaires were conducted before the start of the first training (before training), at the completion of the first one (after the first one) and at the completion of the second one (after the second one), three times in total. There was a two-week interval between the first training and the second one. As a result of the one-factor analysis of variance of participants, with each survey as a factor by each item, the effects of this training workshop were significant in all items. As the result of Holm multiple comparison, significant differences in items A and D were observed in the order of before the training<after the first training<after the second training, and those in items B and C in the order of before the training<after the first training. The first training was centered on the significance of the introduction of ICT to education and the general operation method. The second one was for the concrete contents targeting those with developmental disabilities, including its usage for guidance in cases where “reading” and “writing” are difficult, and how to make interactive digital educational materials. These contents of the training program appeared as the results of the questionnaires, and it shows that an effective training program was developed as expected.