In recent years, public schools have moved away from traditional grade configurations with junior high schools and have shifted toward integrating sixth-grade students into middle schools. It has been argued that the effect this will have on students is to allow for additional freedom and earlier social growth. However, the counterargument to this debate is that these sixth-grade students would then be exposed to an older cohort sooner and, therefore, would be exposed to negative peer influences. This study investigates the behavioral differences between sixth-grade students in elementary schools and their counterparts in middle schools, including suicidal thoughts, violence, and substance abuse. The data used come from the 2007 middle school Delaware Youth Risk Behavior Survey. Results indicate significant differences in suicidal thoughts or actions based on the grade configuration of school they attend, though not in violence or substance use. (Contains 4 tables and 7 notes.)