其他摘要：The purpose of this study were; 1) to design and develop learning activities of ASEAN studies based on blended learning using constructionism theory approach to enhance thinking skills in 21stcentury for tenth grade students, 2) to compare learning scores before and after learning ASEAN studies based on blended learning using constructionism theory approach to enhance thinking skills in 21st century and3) to compare enhance thinking skills in 21st century before and after learning ASEAN studies based on blended learning using constructionism theory approach. The cluster random sampling consisted of 20 students from tenth grade students of Thong-En Wittaya School, Singburi Province in semester 1/2017 academic year thecluster random sampling. The research instruments were ASEAN studies learning management based on blend learning sing constructionism lesson activities, achievements test and thinking skills in 21st century test. The data were analyzed by mean, standard deviation and t-test dependent. The results of this research were as follows : (1)The learning activities of ASEAN studies based on blended learning using constructionism theoryconsisted of 5 steps as follows : ASEAN Steps ; Step 1 : A - Aims of Learning Outcomes ; step 2 : S - Searching ; step 3 : E - Enactive ; step 4 : A - Action Learning and step 5 : N - New Knowledge. The evaluation of the appropriateness of learning activities steps was item-objective congruence index at mean 0.98.(2) The learning scores before and after learning ASEAN studies based on blended learning using constructionism theory approach level of the students were higher than that of the pretest with statistical significance at .01.(3) The thinking skills in 21st century before and after learning ASEAN studies based on blended learning using constructionism theory approach in posttest of the student was higher than in the pretest with statistical significance at .01.
