Conception on Multiplication of The Study of Grade 2 Students in Classroom Using Lesson study and Open Approach

Abstract

This research aims to study the mathematical thinking skills in multiplication of grade 2 students who learned in a Lesson Study classroom and using the Open Approach. The study used a mixed-method approach and the targets group were 38 grade 2 students from the demonstration school at Khon Kaen University in the second semester of the academic year 2023. The research tools included 1) six lesson plans for multiplication, 2) observation forms for student learning behaviors, 3) video recording devices, 4) cameras, and 5) a test to measure learning outcomes. The data were collected by recording classroom videos and camera. The quantitative data analysis included mean scores and learning outcome. The research found that mathematical thinking skills in multiplication of grade 2 students passed the 60% threshold with a percentage of 86.84, and the average score was 14.34, SD=3.54. The mathematical thinking skills were crucial for students' learning, starting from the fundamental concepts till they could solve complex problems.