It's easy to make comparisons between "Key & Peele" and "Chappelle's Show": Both air on Comedy Central, both are sketch comedy shows, and both star African-American guys.
However, that's not really fair for "Key & Peele," which has quietly become a whole different beast of its own, as well as one of the funniest and most original shows on TV. It traffics in weirder humor than "Chappelle," and while it can occassionally go over-the-top (despite the president's endorsement, the "Obama and Luther" sketches normally just devolve into a lot of screaming), it's delivered two classic sketches in its short run: The one on Obama partying at Occidental ("Oh! Intercepted!") and the college bowl player introductions number.
Long story short: It's a show you need to start watching. And the sketch above, which plants the stereotypical no-bullshit inner-city substitute teacher at a privileged, predominantly white school, is another hit.