École secondaire catholique l'Essor is a publicly funded separate (Catholic), French-language high school located in Tecumseh, Ontario, Canada (formerly St. Clair Beach), established in 1979. It serves the Francophone population of Essex County. The name l'Essor, coined by local resident Florence Limoges, is a portmanteau combining "Essex" and "Windsor". Essor also refers to the French word "to take flight". The school belongs to the Conseil scolaire catholique Providence.