Provide feedback that will not be embarrassing to secondary-level students. Provide immediate feedback when students are not meeting your expectations. For example, you may have a rule stating that students must raise their hand if they have a question or comment during lectures. If you do not wish to share your thoughts with the class, you should not be talking. It is critical that the gentle verbal reprimand be delivered very calmly and quietly.
Emotion weakens the procedure.
Your manner should imply that the students probably did not fully understand your expectations. You will therefore give them more direct information so that they can improve their behavior. This reduces the likelihood that students will resent a reprimand. Verbal reprimands should be private, brief, and as immediate as possible. The more private the reprimand, the less likely the student will feel that he needs to challenge your authority to save face in front of his peers.