Abstract:
This research aimed to (1) develop an application for computing science subject on computational thinking for grade 10 students, (2) to test efficiency of the application in accordance with E1/E2 criteria, (3) to assess students computational thinking skills from using the application, and (4) to study students learning progress through the use of the application. The research sample included 40 grade 10 students from one structured classroom focusing on science-mathematics, Rayongwittayakom School, selected by a cluster sampling method. The research instruments comprised (1) the application for computing science subject on computational thinking for grade 10 students, (2) computational thinking skill measurement, and (3) pretest and posttest. Statistics used for data analysis were percentage, mean, standard deviation, E1/E2, and effectiveness index. The study results revealed that (1) the quality of the content of the application for computing science subject on computational thinking for grade 10 students was at a very good level and the quality of media was at a very good level. It could be installed and operated through Windows-based computers and Android-based smartphones, (2) the efficiency of the application in accordance with the E1/E2 criteria was 84.75/84.83, which was higher than the normal criteria of 80/80, (3) the sample overall computational thinking skills were at a good level, accounting for 77.65%, and (4) the sample had increased learning progress with the effectiveness index equal to 0.6884 or 68.84%.