This study aims to improve student achievement in stationary and traveling waves using the Lectora Inspire application at SMA N1 Baitussalam. This study used a classroom action research method, involving 20 students in an experimental class using the Lectora Inspire application. Data collection was conducted using multiple-choice and essay-based tests. The N-Gain test was used, with a value of 0.62, which is considered moderate. The results of this study indicate an increase in student achievement after using the Lectora Inspire application. Therefore, Ho is rejected and H1 is accepted, indicating an increase in student achievement in stationary and traveling waves using the Lectora Inspire application at SMA N1 Baitussalam
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