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University of Illinois Laboratory High School (Uni High) is a selective admission, public, laboratory school sanctioned by the State of Illinois and associated with the University of Illinois at Urbana-Champaign. The school serves academically talented students, residing in Illinois, from the subfreshman level (combined 7th and 8th grades) through high school. The school was established in 1921 and is located on the campus of the University of Illinois in Urbana, Illinois. Its enrollment is 325 students.

According to its mission statement, Uni High is a catalyst for educational innovation. For example, a Uni faculty member initiated the New Math program. Uni seeks to spark the creative fervor and high aspirations of its students and to inspire them to excellence. The faculty at Uni challenge students through traditional and experimental strategies to ignite their potential for active, responsible involvement in the adult world.

Uni High students enjoy free access to the University campus, including concurrent enrollment in University of Illinois courses. Uni High students have access to the University library system equivalent to that of any undergraduate.

As a public school, Uni does not charge tuition. The Illinois State Board of Education provides General State Aid per student. As a unit of the University of Illinois at Urbana-Champaign, Uni High receives funding for salaries, utilities, building maintenance and other services. The school Advancement Office, with support from the University of Illinois Foundation, is responsible for raising funds from parents, alumni, foundations and corporations.