This research is a type of development research using the 4D model (Four D Models). Developing a tool in studying and delivering physics material for teachers and students is the aim of this study. The media in question is physics learning media assisted by Adobe Animate on the harmonious vibration material on the spring. Furthermore, it is hoped that Adobe Animate assisted physics learning media can help teachers and students in delivering and studying physics material through online learning. The trial subjects of this study were students of class X MIA 4 SMA N 1 Banguntapan Bantul which consisted of 34 students. The result of this research is that a learning media assisted by Adobe Animate has been developed on harmonious vibration material as a tool for teachers and students in online learning. Physics learning media assisted by Adobe Animate is suitable for use in online physics learning with the "Very Appropriate" category according to media and material experts, as well as according to physics learning practitioners. Physics learning media assisted by Adobe Animate is also very interesting to use during the physics learning process online in the "Very Interesting" category according to the students.

This study aims to determine the level of critical thinking ability of students in learning using adobe animatebased learning media. This research is a type of experimental research. The design in this study used a post-test control group design with simple random sampling technique. This research was implemented at SMAN 1 Banguntapan Yogyakarta. The sample in this research were students class X MIA 4 students as the experimental class and X MIA 3 students as the control class. The indicators of critical thinking ability tested are identifying concepts, clarifying concepts, problem solving, making general conclusions and analysing concept. The results showed that the ability of students in the experimental class was higher than that of the control class. This applies to all measured indicators of critical thinking. The average thinking ability of students in the experimental class is at a very high level while in the control class it is at a high level. The results of the analysis using the independent t test show that there is a significant difference in the critical thinking ability aspects of students in the experimental class with students in the control class.