Has your dc gone to Oxford or Cambridge to study maths from a non-selective state school?
ds2 has always been super-maths-oriented; but in his non-selective state he would get little/no support for preparation for STEP etc. And his maths experience would be way behind, say, students from the Far East, or Magdalen College School, or similar.
So, has anyone actually done this successfully? And if so, did you end up paying a lot for private tutoring?