. This study aims to describe the implementation and achievements of online learning supervision at SMA Negeri 10 Malang. The supervision instrument was prepared based on the experience of carrying out lesson study activities. The sampling technique was carried out by proportionate stratified random sampling. The teachers were divided into three groups, namely the baby boomer group, generation X, and generation Y. The results of online learning supervision research showed that at the pre-supervision stage, the teacher's ability to prepare learning from lowest to highest in sequence was the baby boomer teacher group, then the group of teachers of generation X, group of teachers of generation Y have the same ability. At the class visit stage, the percentage of achievement of the initial activities in learning, from the lowest to the highest level, was obtained by the X generation teacher group, then the Y generation teacher group, and then the baby boomer teacher group. In the learning process for core activities, the achievement of activities from the lowest to the highest was obtained by the baby boomer, generation X, and generation Y teacher groups, while the achievement of closing activities in learning from the lowest to the highest order was obtained by the X generation group, followed by the Baby Boomer teacher group, and Generation Y teacher group. In the post-supervision stage, data on different constraints and solutions were obtained from the baby boomer teacher group, generation X teacher, and generation Y teacher.