According to EASA, the required knowledge during BASIC training for aircraft and their performance is:
- Recognise the most commonly used aircraft.
- State the ICAO aircraft type designators and categories for the most commonly used aircraft.
ie: Type designators, approach and wake turbulence categories
- State the standard average performance data of the most commonly used aircraft.
ie: Rate of climb/descent, cruising speed, ceiling
So the job of the school is to pick a number of aircraft that are common, and then make cards with the required knowledge to give to the students.
Fortunately, it doesn't state how you select the aircraft, or haw many... So the most easy is to take a pick amongst the ones the students are most likely getting to work with.
To answer the initial thread, the school decides what you have to learn, just ask them.