each village or community has at least one local state run school. spain recently did very well in the european schools test (pisa study), so you could easily send your daughter to one of these.
try to pick one where the subjects are not taught solely in catalan (local dialect). there are many in which both castellano and catalan are taught.
there are also several private schools
morna valley - english private school near san carlos.
can blau - deutsche schule in san agustin.
french school in sant jordi. if you are a french citizen, the french government will help pay for the school fees.
i suppose the choice of school depends on how well your daughter speaks spanish (if at all) and how much local integration you wish.
contact your local spanish embassy to find out how and when to apply