School counselors need a quick and effective means for determining substance use risk levels among their student population. The current study investigates sensitivity and specificity of a six-item screen, the UNCOPE, with a sample of adjudicated adolescents. Analysis reveals that the UNCOPE screen possesses suitable sensitivity and specificity to make it acceptable for routine screening applications. While caution must be exercised in applying the UNCOPE to general school populations, the results show a promising potential for it to serve as a tool for school counselors. Further research should examine the sensitivity and specificity of the UNCOPE screen with diverse student populations. (Contains 2 figures and 1 table.)