This research is based on an interview and survey-based case study of an Islamic "lycee", a Catholic "lycee", and two public "lycees" in the Ile-de-France region of France. The study investigated whether students in private schools receiving some form of education about religion tend to be more tolerant and demonstrate more religious understanding than students in public schools receiving little to none. The results showed that tolerance and understanding were not necessarily codependent and that a number of other factors seem to have a similarly significant impact on student religious tolerance and understanding as receiving education about religion. (Contains 2 footnotes.)