Your location is uncertain and the way training is conducted in different countries does vary considerably.
Very few UK FTOs have more than one FIC instructor so it is usually a one to one situation, ideally with two students at the same time.
You should be given a demonstration of all major briefs, both long and pre-flight. You will then be expected to give them to the instructor prior to teaching that exercise. The course is not long enough to give every brief.
Flight training is usually broken int a "Give" where the instructor teaches you how to give a lesson emphasising the new skills being taught. There is then a "Give Back" where you give the exercise to the instructor, who will then correct any errors you make. Quite often a typical flight will involve the instructor giving you a new exercise followed by the student giving back the one received on the previous flight. That way there is time to study what you were taught, and give a brief before flying the exercise.
You will be taught how to conduct a debrief and will have to debrief the instructor when he acts as a student.
You should be given a set of notes but it is recommended that you make your own notes for use in the air. You cannot remember it all and for the first few hundred hours having a set of notes you can use in the air will be invaluable.
Powerpoint is fine, but in most flying clubs all you will find is a board so you will need to be able to present a brief in a conventional manner. It is much easier to conduct an impromptu brief to explain something on a board than to do it in Powerpoint which has to be preprepared.
The above depicts the UK way of doing things and is largely based on methods developed by the RAF. The way it is done in other JAA States appears to differ considerably.