The building was constructed as part of a consolidation of three smaller middle and high schools: Lamoille Central Academy, Johnson, and Cambridge.

[4] In 2016, Lamoille Union adopted proficiency-based graduation requirements in line with the Vermont Educational Quality Standards.

In addition to core academic subjects, Lamoille Union offers courses in Business, Design, Music and Dance, Art, and World Languages, as well as Advanced Placement courses in English, Math, Science, Social Studies, World Languages (French, Spanish, and Latin) and Art.

In 2012, Lamoille Union launched the Lancer ONE initiative, which has the goal of providing students with universal access to computers.

[6] Lamoille Union hosts a range of student- and faculty-organized extracurricular activities, including chorus and band, dance, debate, 4-square, Scholars' Bowl, and Student Council.