Did your child sit prep entrance tests at a number of prep schools and have different outcomes?
I just wondered what the schools base their admissions on. If two prep schools are very similar in standard, how come a child will get a place in one and not the other?
Also, at 7/8, is the test based on what the child has covered rather than their ability to learn? I think this is a very young age to dismiss a child based on their past educational experience.