So here is tip #3 on how to increase interest, involvement and results when teaching grammar:
Give plenty of examples. And make sure the student makes plenty of example sentences of their own.
An incorrect way to do this would be to teach a new grammar rule and then give an example or two.
You should get much better results if you show the student many practical examples, and then have them make at least 5-10 examples of their own.
For instance, in the English Verb Tenses section of Really Learn English, each tense has many illustrated examples, as well as example sentences. Such as:
Don't neglect the student's own examples, as they are key to mastering any subject.
There are more tips to come.