Angelo and Cross (1993) stated that the classroom assessment was a technique which could help the
teachers to know that what their students were studying in class, and how much did they know. Therefore, the
classroom assessment reflecting the students’ ability as well as being information for related persons to use in
student development, and learning and teaching as real situation—the classroom assessment and course levels
(Toongkasamit, 2007) as well as the principle of classroom assessment needed to perform in aligned with
instruction (The Academic and Educational Standard, 2008b). It was also supported by Kanjanawasee (2006)
research report in assessment for learning: A proposed policy stated that the classroom assessment was a part of
learning and teaching which the teachers had to perform regularly including before, during, and after the instruction