Students with emotional and behavioral disorders (EBD) often receive low rates of teacher praise and high rates of teacher reprimands, though they may respond more positively to praise and more negatively to reprimands than their typically developing peers. Teacher praise-to-reprimand ratios (PRRs) are associated with increased student engagement, but more research is necessary to further explore how these ratios affect student behavior, particularly for students with or at risk for EBD. Commonly 3:1 or 4:1 is recommended as a desirable PRR, but students with EBD may need higher ratios to improve their classroom behavior. In our study of 540 students and 149 teachers, we found that as teacher PRR increased the engagement of at-risk students increased, though engagement for typically developing peers did not. A PRR of approximately 9:1 was needed for students at risk for EBD to approximate the engagement levels of their typically developing peers. No effect of PRR on disruption rates was found for either student category.