The six-week school summer break should be scrapped in favour of spreading holidays more evenly throughout the year, headteachers have suggested.
The move is being considered by the NAHT (National Association of Head Teachers) in a bid to reduce the cost of holidays during August and prevent teachers from being exhausted at the end of term.
The union is considering the proposal as part of a new education manifesto it is drawing up at its annual conference this weekend ahead of next year's general election.
A ski holiday firm is encouraging parents to take their children on holiday during term time by offering to refund fines imposed by schools.
MountainBase, based in Bedford, ran a Facebook advert which read: "Are schools in the UK taking the piste! We think so".
The campaign has reignited the controversy over whether parents should be fined for taking children out of school for holidays.
The firm has now said that the offer is "no different" financially to those which over free ski passes or holiday slots to children, adding: "We do not condone such actions and leave the decision solely at the discretion of the parents."