This study investigated the amount of time secondary school teachers spent working and the types of work activities, based on records and survey forms from 348 teachers in secondary schools in England and Wales. Findings include: (1) the weekly mean time spent on work was 54.4 hours; (2) teachers spent an average of 16.9 hours teaching, 12.9 hours in preparation, 18.1 hours in administration, 5.3 hours in inservice training, and 4.1 hours in other activities; (3) there was a positive relationship between salary and long hours of work; (4) there was a negative relationship between salary and time spent teaching, with more experienced and higher paid teachers spending more time on administration and in meetings; (5) 40 percent of teachers felt that their academic background was not well matched to their current teaching; and (6) there were no significant gender differences in the amount of time spent on work. Policy issues discussed include the use of teachers' time, match of subject expertise to teaching duties, gender and secondary teachers' work, national curriculum and assessment, and the "conscientiousness" factor and teacher motivation. Appendices provide copies of the Record of Teacher Time form and the secondary teacher questionnaire used and statistical data from the study. (JDD)