What was taught in the past isn't relevant to today. Sorry. Except if you are an instructor for an agency like NAUI and you want to augment your course with additional requirements. Then its useful. But if you are a PADI instructor, it simply doesn't matter. You do only the skills PADI has set in each of their courses. Requiring anything in addition is a standards violation. Adding anything as practice, as you are likely going under the bus if there is an incident in your courses. Stick within standards and you can have two students die in your classes over 5 years like has happened locally and nothing happens to you.