My college experience was that teachers taught how to pass exams, as described in the article. But when asking the teacher how the math worked, they were unable

My college experience was that teachers taught how to pass exams, as described in the article. But when asking the teacher how the math worked, they were unable to because they learned and were trained through the same system. They didn't 'do' math or know math. They didn't possess the deeper understanding I was looking for someone to explain.