The main purpose of this study was to investigate the availability, preparation and utilization of instructional materials in primary schools of main training centers of national army. To this end, a survey method was employed to conduct the research in six primary schools. The sources of data, then, were teachers, school coordinators, and SPc heads. Simple random sampling technique was employed to select the sample teachers. On the other hand, an available sampling method was employed for school and SPc coordinators. In this case questionnaire, interview and observation were used to gather data from the above sources. The data were analyzed using percentages and descriptive statements. The result of the study indicates that each sample school had a SPC. Teachers use only SPCs as a source of IMs and their commitment and self- initiation in preparing and using IMs was low. Most of the school coordinators used only verbal praise to motivate teachers and no any support of them to teachers. Regarding the types of IMs, there were only visual IMs in schools. The studentbook ratio was one to three, and no 1M was provided by TMD to the schools. In light of these findings, some recommendations were forwarded. These are the school in general and teachers in particular should use alternative sources of IMs. It is important to minimize different military activities of the army teachers so that they can have free time to collect, prf3pare and use IMs .In addition, due attention should be given by the school coordinators to support and provide the appropriace incentive systems to teachers in preparing and using IMs and the concerned body should pay much attention to equip the schools with different and adequate IMs