A teacher in Dallas, Texas, is trying to learn Spanish in order to chat casually with some of his students. He’s having some success with the smartphone app DuoLingo. But an app won’t necessarily give him the slang vocabulary he needs. A good way to learn a new language is to approach it as you would a fitness program. Set reasonable goals, commit to the long term, don’t expect results overnight, and if possible, practice with a buddy or a trainer. This is part of a complete episode.