To my pleased surprise, when I met with my tour group I was confronted with very alert and engaged students “Are there any more questions?” I asked loudly. I was struggling to make myself heard above about thirty seventh-graders, whom I was leading on a tour of the National Gallery of Art. There had already been many questions that morning, even before we began looking at objects in the museum’s permanent collection. We had just finished an analysis and discussion of techniques and symbolism in