The level of an activity proper can be interpreted as science-related social practices (van
Aalsvoort, 2000). Such practices are meant to provide for student needs (as perceived by
students insofar as this is possible, otherwise perceived by society as an area of need) in a more
or less organized way by making ’products’ or ’decisions’ from ’raw materials’, scientific
components, or issues to resolve. The activity can be ’enquiry process’ or ’debate’. These
practices may be characterized by a number of motives, because scientific problem solving
results from wanting to determine a solution which, in turn, can feed a decision making process
linked to the students’ need for resolving a social issue