Objectives: The objective of this study was to describe a modified nominal group technique (mNGT) approach to assess community health priorities and its application to a childhood obesity prevention project conducted with the high school population. Methods: This manuscript provides detailed information of a mNGT separately conducted with 3 cohorts, (students, teachers/administration, parents). Participants used a response sheet to brainstorm, document top 5 responses, and rank each response individually. We also used a unique reverse scoring method to quantify the qualitative data and within and between group scores for comparison against other cohorts. Summaries provided additional insight into the participants' perceptions. Results: The mNGT process successfully reduced limitations common to the traditional nominal group technique by providing an in-depth understanding of perceptions and understanding priorities. Conclusions: mNGT can be useful across other disciplines as a method of gathering rich qualitative feedback that can be transformed into a more quantitative form for analysis.