"Should we be afraid of Ebola?" A study of students' learning progressions in context-based science teaching

In this study, we explored how learning progressions were established in a context-based science teachingunit. A science class in secondary school was followed during a teaching unit in Biology, in which theEbola disease was used as context. Teaching was planned using the didactical model organizing purposes.Learning progressions were studied as continuity between teaching purposes, the science content andthe context in four sequential lessons. The analysis of teaching evidenced a considerable variation inhow learning progressions were constituted within lessons and showed how learning progressions coulddevelop between lessons through the combination of different teaching activities. By consistently mentioningand referring to Ebola, the teacher had a pivotal role in establishing relations between teachingpurposes, the content and the context. Furthermore, our results evidence the important role of the contextin supporting students’ learning of science content. Finally, we discuss concrete actions in the planning ofthe unit to improve lessons that evidenced a weaker connection to the context.