I do not worry about what they know as much as I worry about how they think. This just might be the highest of all pedagogical goals, because the most important moments in life occur at times when how we think will matter more than what we know. Teaching someone how to think is hard, and takes more effort on the part of the teacher and student. Among other things, it encourages them to ask questions. It involves being comfortable with ignorance, if that happens to be our collective state of knowledge at
