Professional practice on the part of the Interpretivist takes the form of Constructivism. For the Constructivist, meaning and understanding are developed in context. Objective tests, especially those created outside the context of practice, have little meaning. Portfolio assessment and similar approaches are a preferred way to assess achievement. Furthermore, professional preparation is best acquired in context.
Many problems are fuzzy and ill-structured.
They often have complex solutions. Interpretivists would say that some problems have no solutions at all. Postpositivists would argue, on the other hand, that we must work harder to define the problem and find solutions. Willis said instructional designers in the Behaviorist camp break material down into small units and teach each piece separately. Instruction includes basic facts selected by experts as well as concepts and skills.