Friday morning, dozens of school buses from districts across Texas, Louisiana, and Oklahoma pulled up for a routine end-of-the-year field trip exploring Six Flags Over Texas in Arlington. But Ms. Jordan’s class had other plans, coming armed with notes, poster boards, and lots of questions. This is a ninth-grade engineering class at IDEA Southeast College Prep. The students have studied the mechanics behind roller coasters all year. “When I think about engineering, I think ab...