The document discusses teaching aptitude and provides definitions and concepts related to teaching. It defines teaching aptitude as a natural ability to teach. It discusses the objectives, characteristics, levels and goals of teaching. The three levels of teaching are memory level (thoughtless), understanding level (thoughtful) and reflective level (upper thoughtful). The understanding level aims to develop cognitive abilities while the reflective level aims to develop insight and problem solving. The document also outlines the basic requirements of teaching such as professionalism, suitable environment, and the relationship between teacher, students and variables.