I'm teaching my students a skill that takes a long time and a lot of effort to learn.This is a skill that your students will certainly not possess, the art of remaining ignorant.Everyone thinks they know, but in fact they really know only a little.A long time ago, I heard that the Venetians showed off the treasures of St. Mark’s Basilica to a Spanish envoy, but the ambassador only said one sentence, “There is no foundation underneath.” Every time I see the teacher showing off the students’ grades, I always think Send this sentence to him.