How does your primary school cover teacher's non-contact time?

[Hathor]

Interested to know other state primary schools cover the half-day the class teacher is out of the class for non-contact time.
Ours is covered by a classroom assistant looking after the class as they do work set by the teacher. Is this usual, or should we expect more?

We have qualified teachers to cover the time. One is a teacher who has job-shared at the school for 15 years, she now has her 'own' class 3 days a week and does music/cover time the rest (she is a superb musician). The rest of cover time is taken by excellent supply teachers who have worked at the school in some capacity for years.