home, in libraries, in museums, or in the public media. Different types of education can be distinguished, such as formal and informal education or private and public education. Subdivisions Different subdivisions of the philosophy of education have been suggested. One categorization distinguishes between descriptive and normative issues. Descriptive theories aim to describe what education is and how to understand its related concepts. This includes also epistemological questions, which ask not whether a theory about education is true or false, but how one can arrive at the knowledge to answer such questions. Normative theories, on the other hand, try to give an account of how education should be practiced or what is the right form of education. Some normative theories are built on a wider ethical framework of what is right or good and then arrive at their educational normative theories by applying this framework to the practice of education. But the descriptive and the normative approaches are intertwined and cannot always be clearly separated since descriptive findings often directly imply various normative attitudes. Another categorization divides topics in the philosophy of education into the nature and aims of education on the one hand, and the methods and circumstances of education on the other hand. The latter section may again be divided into concrete normative theories and the study of the conceptual and methodological presuppositions of these theories. Other classifications additionally include areas for topics such as the role of reasoning and morality as well as issues pertaining to social and political topics and the curriculum. The theories within the philosophy of education can also be subdivided based on the school of philosophy they belong to. Various schools of philosophy, such as existentialism, pragmatism, Marxism, postmodernism, and feminism, have developed their own perspective on the main issues of education. They often include normative theories about how education should or should not be practiced and are in most cases controversial. Another approach is to simply list all topics discussed in the philosophy of education. Among them are the issues and presuppositions concerning sex education, science education, aesthetic education, religious education, moral education, multicultural education, professional education, theories of teaching and learning, the measurement of learning, knowledge and its value, cultivating reason, epistemic and moral aims of education, authority, fallibilism, and fallibility. Main topics Fundamental concepts of education The starting point of many philosophical inquiries into a field is the examination and clarification