Art's capacity to foster metacognition puts art education in sync with general education where understanding and monitoring one's thinking are acknowledged to be essential to an individual's success in school and life (Kolencik & Hillwig, 2011; McGuire & McGuire, 2015; Silver, 2013). The mindfulness inherent in metacognition also connects it to efforts to make classroom environments more inclusive and collaborative. This article pursues both trains of thought and describes how an art class can be an "art thinking lab"--a site for everyone to practice thinking and develop metacognition together in the context of creative work. It describes pedagogy and curriculum developed by Kimberley D'Adamo, an art teacher at Berkeley High School in Berkeley, California, with support from her students and the co-author of this article.