You're correct. Corrales is in Sandoval County. As for schooling, in 2005, an election annexed the portion of Corrales located in Bernalillo County to Sandoval County, so now the entire village is located in Sandoval County.
You can look up school districts for Albuquerque by going directly to http://www.aps.edu
With regard to buying, I can assist you at no cost, because the seller pays for my services. You can perform a FREE Map-Based Home Search at http://www.syan.com/search
Plus, you can setup FREE Listing Alerts for Corrales by going to http://www.syan.com/alerts
Let me know if you have any questions regarding schools or buying a home.
Syan Real Estate
Call/Text: (505) 730-8181