LINCOLN, Neb. (AP) — Weird Al Yankovic has nothing on DJ Thatch. OK, maybe he has a little more finesse in the vocal department, but Schoo Middle School teacher Cody Thatcher has Yankovic's talent for parody, which he combined with his skills as an educator and took to YouTube. And, man, the Crusades and the Black Plague have never been so much fun. Ariana Grande might have "No Tears Left to Cry," but according to DJ Thatch, "Everyone Starts to Die." The Chainsmokers tell listeners "We ain't ever getting older," in their hit "Closer," but for DJ Thatch's students, "The Crusades are getting started." Thatcher teaches seventh-grade social studies, where students dive into world history. The curriculum, focused on helping students sharpen their thinking skills by analyzing original documents in the context of the events they're learning about, gives teachers a lot of latitude in how they teach, Thatcher said. So he&