“…presented an exploratory analysis to identify teachers' knowledge of open-source educational materials (OER) in pre-university education.In order to identify their views of the idea of open-source educational materials, the possibilities for their use, and the difficulties they may face in educational institutions, data is collected from 99 teachers. The study concluded that there are some barriers associated with the collection, modification, and implementation of educational materials from open source and recommended to develop digital repositories for pre-university education due to their potential effect on improving students' performance Morales et al (2017). established a model for a digital learning resources repository in a manner that promotes access to learning resources and adapts to the needs and desires of students.…”