Developing IT-Based Learning Media of the Aufbau Electron Configuration Principle in Constructivism Oriented Chemistry Learning to Improve Mastery of Concepts and Problem Solving Skills

Abstract

Abstract. The development of IT-based Aufbau electron configuration principle media has been conducted. This study aims to identify the validity, practicality and effectiveness of the use of the media to improve students’ mastery of concepts and problem-solving skills. This study utilized R&D design which consists of problem analysis, data and information collection, product design, product validation, product revision, field trials (small scale), revision from trial results, field trials (large scale), data analysis and reporting. The validity from the validator evaluations obtained a percentage of 88.46% with the very good category. The practicality from student responses acquired a percentage on a small scale of 83.65% and on a large scale of 88.01% with the very good category. The subjects of the study were 30 students. The result of the study revealed that the media effectively increased the mastery of concepts and problem-solving skills. It could be proven from the average N-Gain scores on a small scale of 0.72 and on a large scale of 0.78 with the very effective category. Based on the evaluation results, the product was suitable for use in the learning process on electron configuration material.