Although both constructionism and social constructivism have to do with the way in which social phenomena develop, they are different. Social constructionism refers to the development of phenomena related to social contexts, while social constructivism refers to the creation of an individual sense of their knowledge in relation to the social context. For this reason, social constructionism is typically described as a sociological construct whereas social constructivism is typically described as a psychological construct. Social constructivism has been studied by many educational psychologists, who have worried about its implications for teaching and learning.
Ask critical questions. The model is studenty-centered, therefore students are encouraged tomake connections, ask questions and with the answers ask deeper questions and confront the answers with reality to come to a concluse or purpose a course of action.
A primary source. That would be a source coming directly from someone who was in the war so you know it is reliable and probably the most accurate. A secondary source could be from a journalist or an outside mind that doesn't know the true experience of being in the war and is just observing from an outsiders view.