# Implementation of Star Strategy Learning Activities with Geogebra Program to Improve Concepts in Mathematics for Grade 9 Students on the Toplc of Pyramid, Cone and Sphere Surface Area and Volume

## Authors

• Pathumma Yuson Education Faculty, Naresuan University
• Ratchda Viriyapong Department of Mathematics, Faculty of Science, Naresuan University
• Wanintorn Poonpaiboonpipat Education Faculty, Naresuan University

## Keywords:

STAR strategy, GeoGebra program, Mathematical concepts, Surface area and volume

## Abstract

This research aims to; 1) develop the learning activity using the STAR strategy and the GeoGebra program to enhance ninth-grade students’ mathematical concepts in the surface area and volume of the pyramid, cone, and sphere. 2) developed activity is used to study students’ conceptual ability in the surface area and volume of the pyramid, cone, and sphere after learning through learning activity using the STAR strategy and the GeoGebra program. The participants were twelve night-grade students from a middle-sized school in Phitsanulok province, Thailand.  The research was conducted in the second semester of the 2022 academic year. The researcher used classroom action research consisting of three action cycles for thirteen learning hours in total. Research tools include learning plans, a learning activity reflective form, and a conceptual mathematics test. All collecting data was analyzed by using statistics which are mean, standard derivation, percentage, and one sample t-test (with test value of 65%) including content analysis.

With this, the result points out as follows,

1. There are several points that the teacher should be concerned about when implying the developed activities in the classroom. Firstly, the teacher should review students’ prior knowledge to help apply it to the current study. Secondly, the student should practice using the GeoGebra program and mathematical symbols on computers. Finally, students should analyze the problem by saying aloud as sentences.

2. The results from the analysis of a conceptual mathematics test showed the students’ conceptual mathematics is higher than the criteria of 65%, which is statistically significant at .05. The mean score is 17.83 (out of 24 points), which is 74.29%. Furthermore, when considering further into each question in the test, the results show that most students are at the completed understanding (CU) level.