The purpose of this pilot study was to investigate the effect of instruction differentiation in preventive classroom management strategies on preservice teachers' selected behaviors. Results indicated no significant main effect for treatment condition, and significant main effects for lesson type and microteaching session. Findings indicated that preservice teachers benefited from extended practice in preventive classroom management strategies; however, longer microteaching sessions might be needed to provide more occasions to implement such strategies. With opportunities to practically apply classroom management skills within a university course, preservice teachers might enter their careers with more of a focus on proactive behavior management.