There is no preparation for teaching. After the expiration of teaching, you need to find a new job. In the civil service examination and the teacher recruitment examination, you can give priority to admission when you take the teacher recruitment examination, and you will be prepared after admission. Teachers with special posts are different. Teachers with special posts can continue to work in their original units after the expiration of their service. The school will help them with the enrollment procedures, and they don't need to take the teacher recruitment exam again, so they can become regular. However, if they don't stay in their original schools but return to their hometown, they can be transferred back to their hometown schools after they become regular.