It's helpful to take higher-level classes in Sociology, Psychology, and Human Development. Definitely take at least two or more 2000+ level courses in these subjects. You will learn about society and how it functions in a way that may be harmful to our student and how to combat social constructions and become more aware of them. This will make you a better teacher in the long run and having and understanding of sociology as a whole will make you a better person, help you understand your students and connect with them. Studying psychology and human development will help you learn about the way people learn (and therefore you will learn how to best teach your students). Depending on the phase of life adolescents and children are in, they learn differently, and their brain works differently as well. It is essential to have an understanding of this prior to becoming an educator. It will also help you to connect with students, parents, and families. Human Development and Family Studies will also allow you to become more culturally aware of students and families that come from different backgrounds; this will allow you to unlearn implicit biases and recognize them in yourself and others (and therefore, grow from them). Overall, these three fields of study are absolutely essential when pursuing teaching. Taking the time to take 2 or more classes in each of these subjects will help you become the best teacher you can possibly be. Other than these, the more obvious answer is take as many classes as possible in the subject-area you want to teach AND take education courses.