Research on development of the scales for assessing the degrees of student's understanding about “the decimal multiplied by the decimal, the decimal divided by the decimal”:

For differentiation of the levels and the stages of 5th grade and 6th grade students in elementary schools

Abstract

The purpose of this research is to develop the scales for assessing the degrees of students' understanding about "The Decimal Multplied by The Decimal , The Decimal Divided by The Decimal " . For that purpose, we devised the problems to be checked up on the levels on the basis of earlier reseaches and carried out the test on a total of 191 5th grade and 6th grade students in elementary schools. We then differentiated the levels and the stages within the levels by scalogram analysis on " The Decimal Multplied by The Decimal , The Decimal Divided by The Decimal". We also calculated coefficient of reliability by the Kuder-Richardson formula KR-20 and correlation coefficient between the results of the test and the third term scores about the students. In conclusion, we could develop the scales for assessing the levels of students' understanding about "The Decimal Multplied by The Decimal , The Decimal Divided by The Decimal".