previous studies have found out not that educational applications using the augmented reality (AR) technology have provided immersion,motivation,fun and high level of engagement. however designing and devoloping of the AR courseware with these characteristics while ensuring the effectivensess in teaching and learning process can be quite challenging. the increasingly use of AR has called for the creation of more usable producs of high qality, which in turn, makes the usability evaluation testing an essential process. previous researchers stressed that untill very recently, where the usability evaluation ofA AR interfaces had not been systematically examined. furthermore, nowadays usabiity is a fundamental factor to consider when developing educational courseware. therefore, a good design for the usability evaluation methodology is needed which is best suited for down syndrome (DS) learners in early reading.this paper describes the review of usability ealuation that has been sucessfully applied to previous AR applications. next, we will present several existing usability evaluation methods as a guideline in conducting the usability for AR BACA SindD. Lastly, this paper proposed a design of usability evaluation methodology framework for AR BACA SindD, especially for the DSchildren in this case study. hopefully , the methods that were used for the evaluation as wellas the suitable usability evaluation methodoly proposed, can be deployed to evaluate the effectiveness of the courseware to disable children as general and primarilhy to the DS children.