Possible Clues:

• Policy of long holidays?
• What might suit lazy pupils with little regard for the future
• Temporary semeste?
• Working mothers welcome right over a limited period
• Not looking ahead too much, what schoolchildren like?
• Expedient appreciated by bored pupils?
• Covering a brief period of time
• Little time
• Such as will please most of the pupils, for a limited period?
• Not concerned with long timescales