“…18 decomposition questions, namely 9 pretest questions number (6,33,34,35,36,37,38,39,40) and 9 posttest questions number (7,33,34,35,36,37,38,39,40). 18 algorithm design questions, namely 9 pretest questions (4,11,26,27,28,29,30,31,32) and 9 posttest questions (4,11,26,27,28,29,30,31) , 32). The research results tend to help teachers in the teaching and learning process, carry out evaluations and determine tools to measure students' CT abilities.…”