Old age, limited energy, lost charm. How do old teachers save themselves?

Hello! Indeed, students prefer young teachers to young teachers. But some schoolmasters like old teachers, because they think old teachers are more educated and experienced, and they can learn more with them. Therefore, old teachers should save themselves from two aspects. First of all, they should be serious and responsible in class and impart more knowledge to keep the headmaster's attention. Second, for ordinary students, to make the classroom more vivid, more energetic and lifeless, and to follow the book will only make them uninterested. I think case teaching is a good method. You can consider starting with cases that attract them and starting your class in a guiding way. Let the students listen to your class with an exploratory mind. All the above are handmade. If you are satisfied, please adopt it!