If you looked inside Dan Ryder’s classroom at Mt. Blue High School in Farmington, you might think that he taught engineering. A 3-D printer sits in the corner, there’s a giant box of Legos, and a full cart of electronics right beside. Ryder, though, teaches English. And he uses a method called design thinking, in which he combines books, inventions and brainstorming to create a new kind of classroom experience.