The Classroom holds the full UK PPL theory syllabus as study decks, one course per exam subject. Each course is split into lessons that follow the CAA learning objectives in order.
Open Classroom and pick the subject you are revising. If you have not started, Air Law is a sensible first course. In each course, open the lesson called How to use this deck, then work through the lessons in order. In Flight Performance and Planning that how-to-use lesson is currently last. Read it first anyway.
Where a slide says confirm in approved material, check that figure against your current CAA or approved training notes. Those numbers change. Helicopter-only blocks are labelled and are not on the aeroplane paper. Sample radio calls use a fictional callsign.
Questions go in PPL Theory & Exams. Say which subject and which lesson you are on. Study Aids is for one-page cards and mnemonics. Use those as reminders, not as the full notes.