Depends on your level. Could teach you basic phrases, or more advanced verb conjugations.
I grew up in Southern Arizona, and was exposed early-on to the language. I took the equivalent of six years of formal education in Spanish (it was really about four and a half, I was able to take a summer course and skip almost two years). Academically, I scored a 5 (the highest possible score) on the Advanced Placement test for Spanish Language and Composition. I am able to hold casual conversations with native speakers.