Abstract

This study evaluates Grade 5 students’ mathematical communication competence through the application of the Inside–Outside Circle technique in teaching the numbers and operations strand. A one-group pretest– posttest design was implemented with 40 Grade 5 students at Pham Hong Thai Primary School in Da Nang City, Vietnam. Data were collected using a mathematical communication competence assessment rubric, classroom observation forms, and students’ learning products. The data were analyzed using descriptive statistics and pretest–posttest comparisons. The results indicate improvements across all four assessment criteria, particularly in students’ ability to present and explain mathematical ideas, use mathematical language appropriately, and participate confidently in mathematical discussions. The findings provide empirical evidence of the effectiveness of the Inside–Outside Circle technique in developing mathematical communication competence among primary school students.

Keywords: Grade 5 students, inside–outside circle technique, mathematical communication competence, numbers and operations, teaching mathematics.