This research investigated the level of adaptability and performance of junior and senior high school teachers in Guimba, Nueva Ecija as their response to the rapidly transforming academic world. It utilized descriptive-correlational research and researchers-made instrument. The researchers discovered that the responders are on average 37 years old. They were usually master's degree holders who were single. The majority of them focused on Science and Mathematics as their areas of specialization. The bulk of them dealt with one to five distinct disciplines depending on the number of courses they taught. They have six to seven teaching loads at any given time. In terms of their other related work, the majority of them have two other associated works. Teachers have very satisfactory teaching performance and a high level of adaptability in completing other related jobs and adapting to a fast-changing academic environment. Lastly, teachers with a high level of adaptation also have a high level of teaching performance.