Key elements of these improvements will be updating aging infrastructure, solving overcrowding issues, making health, safety, and security improvements, upgrading instructional spaces, and enhancing career & technical education areas.

[4] At one time, the school was home to an "Aviation Technology" class from 1980 until the early 2000s in which students constructed an airplane from a kit for private sponsors.

It was removed from the curriculum due to lack of sponsors and a lack of accredited teachers, as the school required teachers to not only hold an Illinois teaching certificate but also either a pilot's license or an airframe-and-powerplant mechanic certificate from the FAA.

[9] The program had to postpone several games in 2023 due to allegations of hazing and violations from several students of the school's athletic code of conduct.

[10] According to the 2023–2024 Mundelein High School fact sheet, 47.6% of students for that year were Hispanic, 39.4% were White, 6.0% were Two or More races, 4.8% were Asian, and 2.1% were Black.