This book addresses the topic of science education, from the viewpoint of the theory of radical constructivism. It takes a closer look at the "image of science" that is projected, in the presentation of it to students and to the general public. This leads into a broad discussion of the notions of learning and knowing, specifically referring to issues of epistemology (the nature of scientific knowledge) and ontology (what science can tell us about the world), and the implications of these issues for science education. In particular, a detailed analysis is given of the dichotomy of relativism vs. realism, and its consequences for the concept of truth in science.