Casey Anthony -- Studying Hard for Her Future

Casey Anthony has finally enrolled in classes, as her probation requires, and TMZ has learned her course of choice ... Spanish.

Anthony is required under the terms of her probation to either get a job or go to school. Sources close to C.A. tell TMZ ... she chose to study Spanish because she felt it would come in handy when she goes back to work in Florida.

We're told Casey is taking the classes online, but not through a traditional online college, because of security issues. According to our sources, Anthony is studying through a private organization ... which means her records will be kept under wraps.