Because of the lack of quality teacher training for new college professors, and of the limited amount of time spent on it where it exists, the importance of pedagogical theory tends to fade into invisibility. Being familiar with how people learn, however, can help inform the choices a teacher makes when in the classroom. Go to this site in order to find more theories that you will know what to do with.
In order to show you how useful this knowledge can be in the classroom, try doing the following exercise:
Pick three theories that interest you, and with which you would like to work. Then, apply each of those theories to the teaching of ONE art-related concept. Describe how each theory would change the method by which you would teach that one concept or procedure to a class of Intro-level students.
The concept could be technical, as in “how these three theories can be applied to a demo on drawing with water-soluble materials on a lithography plate”, or aesthetic, as in “how these three theories can be used when discussing Post Modernism”, or conceptual, as in “how these three theories can be used to teach the concept of scale”.
Write one full page (300 words minimum) for each of the three theories (total of 3 pages). For each page, first describe your understanding of the theory, and then show how you would apply it to that one specific thing to be taught. (The theories will differ, but the concept or procedure to be taught remains the same each time.) Each essay can be a stand-alone; they do not need to flow from one to the other.
Then sit back and marvel at how much overlap there is, how much of this you already “knew” on some level, but how much more aware of it you will be when in the classroom with your students!