Augmented reality (AR) is an emerging technology that has been successfully integrated into education. However, the use of AR as a tool to achieve educational inclusion has not been deeply explored. This study introduces CooperAR, a methodology aimed at attending educational inclusion, understanding inclusion as a process where the needs of all students are taken into consideration. CooperAR focuses on the creation of AR-based learning scenarios, in which teachers and students become co-creators of content. The methodology is based on the principles of Universal Design for learning and the Cooperative Learning approach. The effectiveness of CooperAR was validated in the context of a case study that involved 66 students. The results showed promising results, suggesting that CooperAR is an efficient methodology to promote educational inclusion through cooperation.