This chapter discusses how teaching and research activities differ across academics’ career stages. Specifically, we focus on differences in their preference for teaching and research, budgeting time, teaching methods used, research approach, and research productivity. For this chapter, we analyzed a sample of 900 academics in the Korean Changing Academic Profession data. We found that senior academics lean more toward teaching but allocate more time on research; junior academics on the other hand have a stronger preference for research but spend more time on teaching and administration. In their teaching, Korean academics use lecturing as their main instructional method. In the classroom, interestingly, senior academics tend to emphasize practical and more socially oriented knowledge than do their junior colleagues. In terms of academic productivity, junior academics have a high rate of publication in international journals, while senior academics are high performers in relation to domestic journals and book publications.