We will address the concept of forest school and how this approach is adapted in different countries. The majority of the research that we will present involves mostly children and schools. First, we explain the different approaches underlying education in nature, as well as the basic principles of these approaches found around the world. We will explore in more detail the physical, cognitive, emotional, and mental health benefits that have been found in the literature. Then, this article will address certain limits present in various studies in connection with semantics and empirical validity.