Evaluation on Mathematics Teachers' Technological Pedagogical Content Knowledge (TPACK) Scale Using Rasch Model Analysis

The purpose of this research was to evaluate the Technological Pedagogical Content Knowledge (TPACK) scale before being explicitly used to measure mathematics teachers' knowledge of technology integration in teaching and learning. A Rasch model analysis was used to evaluate these mathematics teachers' TPACK scale. In this research, 66 secondary mathematics teachers were chosen as a sample to answer these 28 items with 5 points Likert scale. The collected data were analyzed using Winsteps software to obtain the Rasch model analysis output. The findings expose that the item in this mathematics teachers' TPACK scale has reliability value .94 and separation index was 3.90. For the person, the reliability value was .94, and separation index was 3.90 too. However, some misfit items were purified and eliminated according to the research purpose and discussion with an expert. Therefore, for future research, this evaluation of mathematics teachers' TPACK scale has provided statistical evidence that can use in measuring teachers' knowledge of technology integration