Thank you for both your inputs.
In my reference to modular PPL training I was referring to completing the PPL outside the part of an integrated education of becoming a commercial pilot.
The briefings I was mentioning are "long briefings". As you mentioned, pre-flight briefings are about the particular lesson. Long briefings are presented when introducing a new exercise. It is suppose to last for about two hours, differing on the subject, and I find it very thorough theoretically.
Referring to the book "Flight Instructors Manual" by R. D. Campbell, there are good explanations of the conduct of long briefings. And the theoretical knowledge suppose to be presented are on the detailed level of the PPL theoretical books and examination which the student already have completed, or is going to complete on the ground course / self study.
So how do you as a flight instructor usually conduct these long briefings? Do you use a standard presentation or do you present it orally and consider the students theoretical knowledge?
I am grateful for any tip that can make me a better instructor.
