Getting information about persons who have shown interest in the phenomenon of "Open School". How did respondent get information about "Open School" / following courses from "Open School" on radio or television / which courses were followed / evaluation / what lesson material was ordered and why, how was it used / evaluation of materials / what kind of information about "Open School" was asked for / reactions by telephone to broadcastings from "Open School". Background variables: basic characteristics/ household characteristics/ occupation/employment/ income/capital assets/ education