Dead Prez is the duo of stic.man and M-1. They are, much like Immortal Technique, known for their politically provocative lyrics. Their debut album Let's Get Free, released in 2000, was led by the hit single "Hip Hop" (you've probably heard it). Also on that album is today's song, titled "They Schools," which takes on racism in the school system.
Dead Prez - They Schools => LISTEN
Cool fact: they met in my hometown, Tallahassee, Florida, while attending FAMU.