IMO - if you intend to make Spain your home - your nippers NEED to get into a Spanish School as fast as humanly possible.

I've two mates in Germany whose experience I can relate. Both came from the USA. Had kids of similar ages - both had German born wives. One put his kids in a US school the other German.

The US schooled kids shot off back to the US as soon as they could. Never learned more than VERY rudimentary German and NEVER went anywhere except US base amusements. The others integrated despite a TOUGH 6 months at first. Stayed in Germany and fully integrated. Remember however tough it is - at home they'll have an escape.

The choice is yours and to some extent theirs too. My parents gave up living in the Caribbean and returned to the UK so that my brother and I received "proper" schooling without us having to "board". I recall being told about the options - I don't recall being happy at the thought of boarding. If we'd stayed I'm sure I'd still be there though. I recall having issues adapting to the UK for a while.