This study aimed to demonstrate sustainable education practices in the field of amateur guitar education during the COVID-19 pandemic, emphasizing that all lessons were conducted entirely online. The goal of the study was to enhance economic, social, and environmental performance through a comprehensive approach that assessed the effectiveness of activity-based lesson plans focused on scale, chord, and arpeggio instruction. The lesson plans were designed to include introduction, development, and evaluation sections. The instructional intervention involved five beginner-level students over an eight-week period, with performance data evaluated by three expert evaluators using a 5-point Likert scale. The evaluation allocated 40% weight to theoretical knowledge test results and 60% to performance test outcomes, with student achievement scores ranging from 89.2 to 98.8. The success of the study highlights the potential for sustainable education practices in challenging times like the COVID-19 pandemic and serves as a model for others to follow.