Another teacher (or teachers) used the “stick” approach – a few smacks on the hand with a ruler. From what I remember, it was only for misbehaviour, not academic failure.
I have clearer memories from my second junior school – including a very nice Welsh teacher who emphasized the pronunciation of his name (Llewellyn) and who taught us to sing “Ar hyd y nos”. I had a lot of respect for him so always attempted to pronounce his name correctly.
This was a combined infants’ and junior school. The infants were at one end of the school and the juniors at the other. There was only one playground but the infants stayed (were kept) at “their” end of the school and the juniors stayed at their end.