Peningkatan Kemampuan Berpikir Kritis IPAS Melalui Numbered Heads Together Berbantuan Canva Site pada Murid Kelas V: Penelitian Tindakan Kelas

Abstract

Purpose – This study was motivated by the implementation of the “Merdeka” Curriculum and the need to develop 21st-century skills, particularly critical thinking. Based on preliminary observations and initial assessment, data shown that students’ critical thinking skills in science lessons are still in the “Very Poor” category with an average score of 54,7 and a completion percentage of 13,8%. Therefore, this study aims to improve students’ critical thinking skills in science lessons through the Numbered Heads Together NHT learning model supported by the Canva website.
Methods – This study is a classroom action research project conducted in two cycles, with each cycle consisting of two sessions, involving 29 students of Grade 5B at SDN Karangroto 03. Data were collected through classroom observation using an observation sheet and written essay tests. Scores were calculated based on the critical thinking assessment rubric and "are considered complete if they reach a score of 72. Data were analyzed descriptively by comparing the average scores and percentage of completeness of class 85% in pre-cycle, Cycle I, and Cycle II.
Findings – The results of the study indicate a descriptive improvement in students’ critical thinking skills in the pre-cycle, the average score was 54.8, with a class-wide mastery rate of 13.8%. This increased in Cycle I, with an average score of 70.3 and a mastery rate of 51.7%. In Cycle II, the average score further increased to 80, with a class-wide mastery rate of 96.5%. These findings, obtained from score evaluation tests administered in each stage.
Research Implications – The result of the study shown that the use of Numbered Heads Together NHT assisted by the Canva site as a classroom learning strategy can facilitate discussion, argumentation, and individual responsibility when science lessons.