I disagree with Whopity.
Flight training works best if it is structured in a coherent and consistent way. Whether the student shows up every day or once a month, they should know what they are going to be taught, what the expectations are for success for that lesson are and what level of proficiency will be required to move to the next lesson.
Transport Canada publishes a free Flight Instructor guide with a PPL syllabus and lesson plans for each air exercise. Google it and see what you think. There is no need to re-invent the wheel.