Loads of you are likely to have a day off school on Thursday because teachers are striking in England and Wales.
There's about 7,800 schools that will be hit by the strike, which means about one in three schools will be keeping their gates shut for the day.
The teachers aren't going to work because they're unhappy with their pay and want more money.
The strike has caused a headache for many mums and dads as they've had to sort out special childcare.
There hasn't been a teachers' strike like this for 21 years.
The teachers who are going on strike belong to the National Union of Teachers.
A union is a group of people who have similar jobs and work together to look after their well-being at work.
Schools in Scotland and Northern Ireland aren't affected because teachers there have different pay packages.
The British government - which pays the teachers - says it's not going to give in to their demands.
Schools minister Jim Knight said: "I am very disappointed about the expected strike this week, but that is nothing compared to the disappointment of parents, whose children's lessons will be disrupted."