The planned teacher strikes next month could disrupt sports days, school trips and transition days for pupils, a survey suggests.
Teacher members of the National Education Union (NEU) in England are set to stage fresh strikes on July 5 and 7 in an ongoing dispute over pay.
One in six (17%) teachers said pupils are scheduled to be on day trips on the strike dates, a poll suggests.
A poll by Teacher Tapp, of 6,952 school teachers in England, found that 14% said their school has planned sports days on one of the two strike days.
Overall, 4,605 secondary school teachers and 2,347 primary school teachers were surveyed on Monday after the NEU announced further walkouts.
Nearly two in five (39%) secondary school teachers said transition days – in which Year 6 pupils visit their new secondary schools ahead of their official start date in September – are planned on those dates.