Hartley nodded. "So we keep the software, but we train Mr. Abel on it too."
"Lena, look," Hartley said, tapping his desk. "I installed it in Ms. Chen’s third-grade class. She’s our best teacher. The other third-grade class, Mr. Abel’s, is using the old curriculum. After three months, I’ll compare their test scores. Simple, right?" quasi-experimentation a guide to design and analysis pdf
Hartley laughed. "You quasi-people have a workaround for everything." Hartley nodded