The word "self" means your own individual identity. It refers to who you truly are and what makes you unique. It includes your thoughts, feelings, and beliefs that make you who you are. Full definition
A lesson plan should be prepared by any person teaching for self in case of own preparation and for the class in case of teaching the students. (thefashionablehousewife.com)
I've used them as well, in war and in self defense of my family. (religion.blogs.cnn.com)