A 10-yeаr-оld bоy with Tоurette syndrome presents for follow-up. His tics аre moderаte (motor: head jerking; vocal: sniffing) and are causing some social embarrassment but not significant functional impairment. However, his mother reports he is failing in school due to inability to focus, cannot complete homework, is constantly "on the go," and his teacher reports he is disruptive in class. He also has difficulty falling asleep. Which of the following is the MOST appropriate treatment priority?