DD (8) has been helping for a few months at a private yard but doesn't ride every time and I wondered if this was normal. If she does a full day then she will almost always ride but usually only for a short time and if she does a couple of hours after school quite often it is just poo picking etc and no riding at all.
She has recently had a couple of falls (nothing serious thankfully) and the owners are wary about her losing confidence, however she will never get it back and improve if she is not doing much riding and in her own words the lack of riding is destroying her confidence more than anything else! She works really hard and never complains as she loves horses so much.