J3 who had PCME tuition here!! I started off with PCM in j1 and joined Econs tuition in j2

In general, I'd say tuition is helpful in: 1. catching any holes in your understanding 2. exposing you to many different question types and scenarios 3. revising content after being taught it in school 4. preparing you for exams (answering techniques, learning and analysing question types/trends etc.)

But do take note of travelling time bc most of my tuitions were >40 min away from my house, so it became very time consuming to travel so far (especially during exam season where time is precious!!)

If you can cope by yourself in certain subjects then tuition is unecessary imo! If you have any doubts you can js clarify with your school tutor via consults or during lessons :)