Recent research on assessment has shown that formative assessment has a potential to improve students’ learning and motivation. Formative assessment is defined as collecting, interpreting and using information to improve students’ learning (Harlen, Gipps, Broadfoot, Nuttal, 1992; Black and Wiliam, 1998). Thus, assessment is formative only if the information collected is used by both teachers and students to improve students’ learning (Black and Wiliam, 1998). The assessment information can be used by teachers to adjust their teaching to better teach r their students and provide feedback to students about their learning. Students can use feedback to determine where their strengths and weaknesses so that they can take appropriate actions to improve learning. Therefore, feedback is an important part of formative assessment.