How teachers spend their time in the classroom is an area worthy of discussion and debate. What time do teachers spend on various activities including teaching practices and duties especially in classtime? What proportion of classroom time is allocated to certain activities, interactions with students, delivery of content and to the many unplanned incidences that occur in a classroom? Which activities are consistently time consuming and how much time do teachers spend on these activities? How does the time on particular tasks relate to pedagogy? Many studies have investigated student engagement and time but rarely have the above questions been specifically addressed. We are developing an innovative method to assist us in answering these questions and have observed teacher time usage in three typical classrooms. We have begun to answer the question 'What do teachers do?".