The literature suggests that administering drug surveys to public school students is best done by persons outside of the school system (or at least unfamiliar to the students). This is the approach used by the long-time "Monitoring the Future" project. Because of the increased costs that administration by outside research associates requires (both time and transportation), we decided to design an experiment that would compare it to administration by school personnel. Six school systems were split, and 3756 surveys were administered, about half by outside research associates and half by school personnel. The results indicate that there were minimal and non-significant differences between the two groups. On the basis of these results, we draw the conclusion that school personnel are able to administer survey instruments without affecting the quality of the results and, thus, that school districts may safely use such data in the evaluation of their drug education and drug prevention programs. (Contains 5 tables.)