By giving Heather scolding, the teacher could address unwanted behavior (interruptions) and enforce desired behavior (waiting for others to finish before speaking). In order for Heather to achieve this, the teacher must be consistent and preferably reprimand her in a low voice, because research has shown that students respond better to silent reprimands. Reprimands should be immediate, positive and specific, identifying both unwanted and desired behaviors. It is also important that the teacher remains neutral and continually evaluates the strategy, as well as being firm and resolute. The group contingency might be helpful for Heather as she quietly completes independent work because independent work time is a great time to use the group contingency. The teacher might say that anyone who completes their work silently might get a reward. The goal is set for the entire class, but only those who keep quiet receive the reward. Another possibility is that if Heather can achieve this behavior, the teacher can give her the opportunity to gain 5 extra minutes of free time for the whole class by working silently on the work. The rewards in this should be more than simply verbal