This study investigated where and how secondary school teachers generated ideas linked to their work environment. A group of 146 teachers from 20 secondary schools in the Netherlands completed an adapted version of Geschka's questionnaire, which focused on (1) teachers' preferred conditions, environments, media, people, and activities before the moment of idea generation; (2) teachers' environments, time, and situation during the moment of idea generation; and (3) teachers' activities and next steps after the moment of idea generation. Results indicated that before the moment of idea generation, teachers preferred a quiet, relaxing environment. For inspiration, they went to lectures, seminars, and colleagues. They found the countryside helpful. When stuck for ideas, they often thought things over and thought of other things. During the moment of idea generation, they were usually at their desk at home, or else in bed. They did not generate ideas at any particular time. In general, they preferred to be alone when generating ideas. Walking and biking were beneficial to idea generation. After an idea occurred to them, teachers wrote them down immediately and talked to experts to evaluate and develop them. Often, they thought about the ideas repeatedly. (Contains 16 references.) (SM)