In the French education system, high school graduates go to "Prepa" courses for 2 years, then compete for engineering schools where they spend 3 more years; whereas other schools like INSA include the "Prepa" as part of their 5-year cursus.
French high school graduates participate in a preparatory course called "Baccalauréat" for two years before competing for entry into engineering programs that last three more years. Conversely, some schools like INSA incorporate this preparation into their five-year academic plan.