Planned Approach to Healthier Schools (PATHS) is an integrated secondary school health curriculum that functions as a school-wide health intervention. PATHS students work in groups under the tutelage of health professionals to plan, implement, and evaluate health interventions which target student physical activity and nutrition behavior change. PATHS was piloted in one large rural junior high and high school during the first and third trimesters. Pre-experimental research was conducted to determine the effects of PATHS on the physical activity and nutrition behavior of middle and high school students. Pre and post-test Youth Risk Behavior Surveillance Survey (YRBS) data were collected from 15 randomly selected teachers' classes (N=771;.463 junior high and 308 high school) and were compared for physical activity and nutrition behavior pre and post test differences using a three-way mixed factorial ANOVA. Effects for all analyses were time (pre, post), school (junior high, high school), and gender (male, female). Additionally, static group comparisons were made between post-test measures of PATHS schools and a single measure from 18 randomly selected teachers' classes from one high school and junior high within the same school district (N=585, 472 high school, 113 junior high). Pre and post-test comparison data for physical activity behavior data showed a significant two-way interaction for time and school (p < .000). Follow-up analyses demonstrated that significant pre-post differences occurred for junior high (p < .006), but not for high school students. Nutrition behavior data showed a significant two-way interaction for time and gender (p < .037). Although follow-up analyses did not find pre/post-test nutrition differences for either girls or boys, independent samples t-tests identified significant pre-test differences (p < .003), but not for post-test scores. Static group comparison data showed significant physical activity behavior differences between the post-test measures of PATHS junior high school students and the single measure from comparison junior high school students (t = 8.15, p < .000) as well. These pilot research findings raise cautious optimism about the potential of PATHS to increase physical activity behavior of junior high school students and yet more questions in relation to the study's nutrition behavior findings. Additional study is needed to determine (a) the full physical activity and nutrition behavior implications of PATHS for all students if it is sustained over time, (b) how other factors such as self-efficacy change as a result of PATHS, and (c) the impact those changes may have on target health behaviors. Keyword(s): curriculum development, physical activity