I am experienced teaching a wide variety of age groups using a large number of methods, but my preferred method of teaching is to help students break down individual roadblocks using practice questions and Q&A-style analysis of a particular aspect of the subject with which they struggle.
Practice questions are normally derived from textbooks, either owned by the student or myself, although questions are vetted by me to ensure that the material is relevant and up to date. As I am a student myself I do not have access to a large wealth of teaching resources, but I have a large amount of knowledge and experience with the subjects in question.
For individual subject teaching my preferred method is to take questions directly from the students and understand what they struggle with, and then specifically target my teaching at those areas to provide a more complete understanding of the topic. This is accompanied by moments of general review, where I will walk the student through large swathes of content (such as entire chapters or paths of course content) to gain an understanding of the student's level of comprehension of the material, and to demonstrate progress as they improve.
I regularly make use of a whiteboard or pen and paper to teach, as they allow me to draw up and demonstrate concepts to a student as well as walk them through calculations. Because my style of teaching is targeted to each student's specific needs, I avoid pre-made materials or presentations because they are a more general approach to given knowledge which a student is likely to have already received, and therefore I find them less useful for targeting specific problem areas for students.