In reply to Brookesbaker:
I used to instruct NICAS groups, I believe some of the content of the courses have changed since I worked with it, but these are my observations of it as it stood.
Certainly when I delivered it, everyone had to start at level one, no matter what experience they had. All the boxes of each stage had to be ticked before moving on to the next stage. Some, very sensibly so, such as putting on a harness safely without assistance, trying on and belaying. Kids can do it ftom age 7, and some definitely take a while to become proficient at these skills.
With a fairly large group, there can often be a huge disparity in ability and motivation - some kids loving it, keen to do everything, others there because they’ve been sent by parents and have zero interest and everything in between. They don’t tend to get very many climbs each per session as they have to take turns and, certainly in level one NICAS, there’s not a great deal for of emphasis on movement on rock and coaching, it’s more safety/belay/getting up and lowering/behaviour at the wall orientated.
As the levels progress, more technical climbing instruction is introduced but there are still boxes to be ticked, and each level takes longer to complete with more climbs and belays to be undertaken and progression to be made before moving to the next level.
Whilst, NICAS style instruction should produce climbers who can safely and competently operate at an indoor wall, it is rather long-winded and exists at least partly, to keep people paying, keep regular visits to the wall going and keep instructors in work.
Perhaps your son might find a less structured “kids club” type format, or some actual coaching more suited to his needs, although, it shouldn’t be ignored and that learning to be a safe, competent and willing belayer is valuable in the long-term, as he’ll not go short of climbing partners if he has those skills to hand.