I watched Kai Halttunen’s video on how to guide the collecting of information. I got excited about the task in which students were invited to draw their own information horizons. The horizon is made up of concentric circles on which students place their information sources: the primary closest, then the secondary, and so on. The task is suited to many purposes: it helps to evaluate the sources, deepens the searches, and broadens the range of materials. Also in everyday life you can use this method to trace the sources of speech topics and points of view. The more complex a person’s information horizon, the more interesting material he is likely to produce on social media. If the horizon takes in only a few mainstream media, the person’s discussion tends to be limited to the topics introduced by those sources. So a glance at the information horizon is like the sign at the passport office: “Document Checking.”