“…In gathered the data for Material Expert, Media Expert, Language Expert, Learning Expert, the researchers used the Likert Scale questionnaire by providing 4 alternative answers, namely: Strongly Agree (SA), Agree (A), Disagree (D), and Strongly Disagree (SD) to determine the feasibility of each assesmet indicator (Joshi et al, 2015;Salam & Mudinillah, 2021). Meanwhile, In gathered the data for 36 students in 8 th grade used the Guttman Scale questionnaire by providing 2 alternative answers, namely: yes and no (Murtopo et al, 2018;Pranatawijaya et al, 2019). As a result, the instrument used is a questionnaire package as a validation sheet for Material Expert, Media Expert, Language Expert, Learning Expert and 36 students in 8 th grade.…”