The document discusses the potential of location-based mobile learning using mobile devices. It notes that more mobile devices now exist on Earth than people, and are checked over 150 times per day on average. It proposes designing new location-based learning opportunities and mobile apps that incorporate both the learner's needs and context of the specific location to allow authentic, experiential learning. For example, learning about markets by visiting a market, aquariums by visiting an aquarium, or lingerie by visiting a lingerie shop. The goal is to create mobile learning experiences where people realize what they don't know only when present at a location.