An Assessment of Grade 10 Students’ Conceptual Understanding of Geometry

Conceptual understanding refers to student’s ability to reason, explain and apply mathematical concepts using its definitions, relations and representations especially in Geometry. Students need to develop fluency in Mathematics for global competencies and geometry is a best vehicle. This study was undertaken to assess students’ achievement and conceptual understanding of geometry. The study was designed to determine whether Grade 10 students possess good conceptual understanding of Geometry before instruction to remedy and correct concepts which are misunderstood. It utilized descriptive design of research and was conducted at Prosperidad National High School, Prosperidad, Agusan del Sur, Philippines. The participants were the two intact classes of Grade 10 students assigned as experimental and control group. A teacher made two tiered achievement and conceptual understanding test in Mathematics were administered to both groups. Results revealed that there is no significant difference in the achievement of experimental and control group in achievement test with a means of 7.97 and 6.19 and standard deviation of 2.44 and 2.26 and conceptual understanding with a means of 0.35 and 0.21 and a standard deviation of 1.15 and 0.68 respectively. Both groups had a poor conceptual understanding of theories, could not apply, interpret and explain mathematical concepts and process.