TJ, also known as Thomas Jefferson School, is a prestigious and highly regarded co-educational boarding and day school located in suburban St. Louis, Missouri. At TJ, we are dedicated to providing an exceptional education to academically talented students in grades 7 through 12.

Our purposefully diverse community fosters an environment where students can develop a sense of responsibility for their own learning and a desire to make a positive impact on the world through their intellect and creativity. With a low student-to-teacher ratio of 6:1 and a faculty composed of highly qualified professionals, we offer a rigorous academic program that includes English, mathematics, science, social studies, classical and modern languages, and the arts. Additionally, we provide comprehensive college counseling services, with a strong track record of 100% college matriculation.

At TJ, we strive to nurture students' intellectual growth, character development, and overall well-being, preparing them for success in college and beyond