I haven't really thought about this before in any depth. Sometimes the organiser has said £5, this year it was £10. The gifts are usually vouchers for John Lewis plus extra items like candles, beauty items, chocolates. This year £340 was collected for dividing between 2 teachers and 3 TAs on a pro rata type basis. Some families do their own thing and give money to the collection. There's usually a collection at Christmas too. Does every school do these collections twice a year? It's voluntary but then there's a list of those who have donated so anyone who can't afford it or doesn't want to join in is highlighted by their absence.