Schools have very different fee ranges depending on year group hence for simplicity, these "$" sign ratings are meant to denote the relative price difference of the average annual school fees between education institutions in the same category.
Preschool : 5,000 - 20,000
Primary : 7,500 - 35,000
Secondary: 10,000 - 80,000
Tertiary : 18,000 - 60,000
British, STEM, British A Levels