Schools canceling classes because of winter weather in at least 10 states have used up the wiggle room in their academic calendars, forcing them to schedule makeup days or otherwise compensate for lost time.

Some are cutting short spring break, having class on holidays or tacking on extra days. That adds stress for parents and educators trying to plan for schoolwork and time off.,

Boston's schools are extending their year by nearly a week, and Providence will add at least one day. Student sin Philadelphia will make up at least three.

So many Ohio schools have used or exceeded their five allowable days that state leaders are considering adding more just for this year because of the unusually severe bouts of cold, snowy weather.

[Associated Press]