The substantial objectives of the development of mathematical knowledge and capacity are to engender
students with mathematical knowledge and skills and to use them in everyday life and for study at higher level.
Nooprick (2010) asserted that the reason and the necessity for learning mathematics are to help students improve
their problem solving capacity and make reasoning logically; moreover, mathematics could be used as basic
knowledge of any science, and it is an indicator for the success of Thailand’s educational model. In general,
mathematics learning and teaching in the government schools will be assessed by the Supervisor; on the contrary,
the demonstration schools, under the commission of Higher Educational Office, has no model to take
responsibility for this duty. As a consequence, it is the need for the demonstration schools to cooperate among
teachers from each school and give their contributions to the creation of the assessment model