The effects of physics instruction using the common knowledge construction model on explanation making ability and concepts of work and energy of upper secondary school students
Abstract:
This study was a quasi-experimental research. The purposes of this research were 1) to study the ability of explanation making of students taught by the common knowledge construction model, 2) to compare the ability of explanation making of students between the group taught by the common knowledge construction model and the comparative group taught by the conventional instruction 3) to study the concepts of work and energy of students taught by the common knowledge construction model 4) to compare the concepts of work and energy of students between two groups: an experimental group, which taught by common knowledge construction model, a comparative group taught by conventional instruction. The samples were 2 classrooms of Mathayom Suksa 4 students of Deebuk Phangnga Wittayayon School, Phangnga Province, in academic year 2011: the experimental group and the comparative group. The research instruments were 1) the test on the scientific explanation making ability. It consists of (1) the evaluation of the explanation making process with the level of reliability at 0.75, (2) the test of explanation making with reliability at 0.95, the level of difficulty between 0.50 - 0.54, and the level of discrimination between 0.23 - 0.47 and validity of 0.83 and the test on the scientific explanation with the level of reliability of 0.83. 2) The test on concept of work and energy with reliability at 0.85, the level of difficulty between 0.54-0.83, and the level of discrimination between 0.21-0.86 and validity at 0.82. Statistics used to analyze the collected data were arithmetic mean, mean of percentage, standard deviation and t-test. The research findings were summarized as follows: 1. The students who learned through common knowledge construction model had the mean score of explanation percentage of 75.40 which were higher than criterion set. 2. The students who learned through common knowledge construction model had average scores of the explanation making ability higher than the comparative group at 0.05 level of significance. 3. The students who learned through common knowledge construction model had average scores of the concepts of work and energy at the percentage of 76.40 which were higher than criterion set. 4. The students who learned through common knowledge construction model had average scores of the concepts test of work and energy higher than the comparative group at 0.05 level of significance.