Interested in a program where a high school student can go for three or four weeks and advance in spanish. Now in Honors 3 and will be in AP spanish in fall. Looking for 4-6 classes per day and groups in class of <6. Prefer to live with a family and not a bunch of english speaking teenagers. Best suggestions?

The Spanish Embassy sponsors prep courses throughout Spain to prepare students for AP class. They have two summer sessions and local academies run the courses based on the AP curriculum.
http://www.sgci.mec.es/usa/ap-spanish/index.shtml