In this situation it is stunning, that the approach of Action Research is still so undervalued in Vietnamese colleges and universities The approach of Action Research is an established strategy that aims on behavioral change by systematic self reflection and do not need expensive financial means nor highly qualified personnel. | VNU Journal of Science: Education Research, Vol. 31, No. 4 (2015) 54-65 Inert Knowledge in Tertiary Teacher Training and How to Activate it Nguyễn Thị Phương Hoa*, Nguyễn Thanh Hương 1 Dept. of Psychology and Pedagogy, VNU University of Languages and International Studies, Phạm Văn Đồng Road, Cầu Giấy, Hanoi, Vietnam 2 National Academy of Public Administration (NAPA), 77 Nguyễn Chí Thanh, Đống Đa, Hanoi, Vietnam Received 02 February 2015 Revised 26 February 2015; Accepted 22 December 2015 Abstract: The progress of the education development in Vietnam is impressive as recently shown in the very successful performance of Vietnamese students of the last PISA round. On the other hand the problems are still tremendous, above all in tertiary teacher training: many colleges and pedagogic universities are under-equipped, their scientific level is poor and their ability to carry out effective reform steps is low. In this situation it is stunning, that the approach of Action Research is still so undervalued in Vietnamese colleges and universities The approach of Action Research is an established strategy that aims on behavioral change by systematic self reflection and do not need expensive financial means nor highly qualified personnel. The article presents a reform strategy which avoids detailed external defaults and motivates the persons directly involved to put into practice self directed new teaching/learning schemes instead. This self learning by doing promises very effective results as they are based on the direct experience of individuals and groups. To promote the sustainability of this learning scheme and to foster the scientific skills of the participants at the same time the necessary reflection must be conducted by simple means of and according to systematic research. Learning by practising science - even in a simple way means to join the most effective way of sustainable learning human civilisation has developed: learning systematically according to basal .