Hi Clair, a warm welcome to our forum.
First of all can I request that, because you are asking questions specific to an area, you put an area of Spain as your location on your profile (see mine ?). That way we all know where you're asking about. (You can change it later if you need to, of course). Many won't know where Lo Pagan is &, although I should've remembered as we're not too far away, I had to Google to find it was Mar Menor area, which (for the sake of others reading this) is on the Costa Blanca near Murcia airport.
You don't say what ages your kids are. Are you considering Spanish schools where the under 10's approx seem to do very well, according to members chat on the forum. Over that age many do opt to place their children in private education. Please give more details.