“…Observation sheet is an assessment done to observe the existence of an object or the appearance of an observed skill aspect (Rizema, 2013:290;[20]). Performance assessment is an evaluation done to observe the students in doing something and it is suitable to be used to measure competence success that demand students to do a certain task (AlJeraisy, Mohammad, Fayyoumi, & Alrashideh, 2015; Wiggins, 1993; [20,21,28,37]) like practices, discussion, and presentation. This way is considered to be more authentic compared to the written tests because what is measured will mirror the students' real skills (Stinggins In [34]).…”