A study examined the day-to-day work activities of teachers of Technician Education Council (TEC) certificate programs in Great Britain. During the study, a detailed questionnaire dealing with the tasks performed by TEC teachers, the amount of time spent on TEC teachers on individual activities, and the impact of the TEC programs on teacher activities was administered to a sample of 270 teachers involved in TEC certificate programs in mechanical engineering, architecture, building trades, surveying, life sciences, and chemistry and physics. In a second phase of the study, 25 of these teachers were asked to complete work diaries. Based on these data instruments, it appears that a majority of the teachers concerned with TEC programs believed that the introduction of these programs has resulted in their having to devote more time to certain activities. Included among these areas are student assessment, curriculum development, preparation for teaching, administration and liaison. Teachers with TEC responsibilities seem to spend proportionately less time on preparation, for both TEC programs and other courses, than do teachers with no TEC responsibilities. Perhaps the chief problem associated with the introduction of TEC programs is the belief held by many teachers that they have insufficient time to adjust to the new curricula. (The survey instrument, breakdowns of survey data, and data from the work diaries are appended.) (MN)