Another way to approach teaching modal auxiliary verbs is in context, for example, "How to give advice". This is especially useful for students of higher levels that have some knowledge of the various modal auxiliary verbs.
Below you can read feedback from an ITTT graduate regarding one section of their online TEFL certification course. Each of our online courses is broken down into concise units that focus on specific areas of English language teaching. This convenient, highly structured design means that you can quickly get to grips with each section before moving onto the next.
Unit 8 taught me about the different future tenses of the English language. It was very useful for me, because I did not learn all the different tenses in school in such detail. The examples were helpful to understand the nuances of the tenses and the ways they are applied. I think it will be more difficult to teach the future tenses than the past tenses, as the different concepts of the future tenses are difficult to grasp at first. But the presented teaching idead are definately helpful in developing my own class schedules.