Many Vietnamese mathematical educators express their interests in experiential learning since experiential activities have been discussed in the new Vietnamese national Mathematics curriculum, which was promulgated in 2018. Nevertheless, it seems that experiential learning plays a minimal role in the current status of teaching and learning mathematical knowledge and skills. In this paper, we want to expand the role of experiential teaching in the direction of creating new knowledge. Basing on Kolb's experiential learning model, we propose a teaching situation of the side - side - side similarity case of two triangles. This teaching situation leads to a possibility of teaching similar triangles proactively, and at the same time, raises many hypothetical questions about the development of Kolb's experimental model in teaching Mathematics.