Teachers from the National Education Union are set to strike on Wednesday, 1st February (tomorrow).
More than 100,000 teachers in 23,000 schools will be walking out across all the planned strike days for the union.
The NEU will be holding seven strike days which will affect schools in England and Wales.
The Government says that schools should try to stay open, but some schools may suffer partial closures.
In England, teachers do not need to declare that they are striking in advance, and head teachers will make the final decision about any closures that may happen.
There are no rules which say that parents have to be informed about closures prior to the strikes. It's possible that parents may only be informed of closures on the morning itself.
However, there are no minimum staffing rules for schools to remain open. The curriculum doesn't need to be taught on strike days, and head teachers can use volunteers and agency workers, if required, to man the fort.
The full emergency plan set out by the Government can be found here.