This paper is based on a literature review of articles discussing the teaching and learning of philosophy in primary and secondary schools. The purpose of this review was to address two research questions: What 'is 'philosophy? What does philosophy do? This paper addresses the second question—What does philosophy do?—by gathering together research that focuses on and discusses the impact of philosophy in the classroom. Two distinct claims emerge from the literature. The first claim is that philosophy improves academic and cognitive abilities, where the idea of ‘cognition’ is captured by forms of reasoning that can be tested and measured. The evidence for improvement in academic and cognitive abilities takes the form of IQ scores, Cognitive ...