Paul lectured, taught, spoke, reasoned, preached, and interacted with students in the school of Tyrannus every day for 2 years! He had interactive “classes” with people which were sometimes practical in the sense of teaching as he did mission AND non-practical in the sense that he was passing on transforming information or data to be used later on in mission. There’s nothing wrong with a class structure so long as it doesn’t become the only structure or the simple acquisition of knowledge.
