Hi Emma, welcome to Eye on Spain!
Can you be a bit more specific about the location you are looking to move to?
To be honest, at the moment things are very tough in Spain so finding work will be your biggest problem, there are very few jobs available.
Can't give you any advice on schools except to say that your kids are young enough to easily start in a Spanish school with few problems.
Best of luck with it all, I hope it goes well for you.
Justin