Another pedagogical issue is regarding the inflexibility of the content in AR systems (Kerawalla et al., 2006). In some AR systems, the
content and the teaching sequence are fixed; teachers are not able to make changes to accommodate students’ needs or to accomplish
instructional objectives. This issue could be resolved by the use of authoring tools (Bergig, Hagbi, El-Sana, & Billinghurst, 2009), which allow
teachers and students to revise and create AR activities and applications (Klopfer & Squire, 2008).