Poway Unified is the best school district in San Diego County! The school district spans Poway, Rancho Bernardo, Rancho Penasquitos (parts of). I would consider East Lake Chula Vista, Santee.
Here is the link to the school scores.
http://api.cde.ca.gov/reports/API/APISearchName.asp?cTopic=API&clevel=County&cCounty=37,SAN,DIEGO
