Leaders of the New School was a Long Island, New York-based hip hop crew composed of Uniondale, New York, natives Charlie Brown and Dinco D; North Amityville native Cut Monitor Milo; and Busta Rhymes, who was originally from Brooklyn, New York but later moved to Uniondale. The four got their start touring with hip hop group Public Enemy, and in fact it was member Chuck D who gave Busta Rhymes and Charlie Brown their names.

The group made its first appearance on an Elektra Records compilation titled Rubáiyát: Elektra's 40th Anniversary, with a song called "Mt. Airy Groove". It was the only hip hop group on that album. LONS soon joined up with popular hip hop collective the Native Tongues, along with the Jungle Brothers, De La Soul, A Tribe Called Quest, and Black Sheep.

In 1991 Busta Rhymes, Dinco D, and Charlie Brown made a guest appearance on A Tribe Called Quest's hit single "Scenario", and LONS joined ATCQ on The Arsenio Hall Show to perform the track with that group. Their debut album was also released in 1991, titled A Future Without a Past, which included the hits "Case of the P.T.A.", "Sobb Story", and "The International Zone Coaster". The group was praised for its light-hearted content and old-school call-and-response deliveries. The group's second and last album was T.I.M.E., released in 1993, which stood for "The Inner Mind's Eye". The album was less acclaimed than the group's debut,[citation needed] but it spawned the hip hop hits "What's Next" and "Classic Material".

As time passed, fans and critics began to focus less on LONS as a group, and more on Busta Rhymes as an individual. During an infamous appearance on the TV show Yo! MTV Raps, the group was seen arguing, with member Charlie Brown becoming upset over Busta's show-stealing. The group soon split up, with Charlie Brown, Dinco D, and Milo garnering very limited success individually, while Busta Rhymes' popularity continued to increase. The group made an appearance on Busta's 1996 debut album The Coming, on the track "Keep It Movin'" and was the last time they would collaborate as a group.