I think the advantage of going to an international school is that you can study Alevel courses systematically and complete the exam directly at the school. Parents don't have to worry too much, and the school will make proper arrangements. The disadvantage is that tuition fees are generally high, and the threshold is high, and the quality of schools is mixed.

If you study by yourself, you can go to BC to register for the exam. You can find some remedial classes or something. The whole process is laborious, but the threshold is low. If parents have a lot of time or can find reliable people, they can also consider this road.

In my opinion, there are ways to send money to international schools at home. One is to study systematically, and the other is to expand children's own circle of friends. Those children who have ordinary family conditions but are talented and willing to work hard may not be able to go to international schools, and now good remedial classes are no worse than schools.