Tasha, 29, is a former Miami cocktail waitress who finished her teaching credential last fall and hit the substitute circuit hard. She walked into a notoriously rowdy 10th-grade history class at Roosevelt High in Columbus, Ohio, and before she even said a word, someone started slow clapping. (The teacher whose class it was has been subbing for 22 years. He has never received a slow clap.) Tasha ran through attendance in about four minutes — which is a record — because every single student was present, alert, and answered at full volume. The lesson plan was a worksheet on the Missouri Compromise. Zero worksheets were completed. Zero students complained.