Wikipedia makes this difference (right now today) "While social constructionism focuses on the artifacts that are created through the social interactions of a group, social constructivism focuses on an individual's learning that takes place because of his or her interactions in a group."

What is the difference between constructivist and constructivism?

The philosophy of constructivism say that learners will construct their own unique meanings for concepts, so it is not at all reasonable to evaluate students as to how well they have all met some normative goal. ... Constructionism is more of an educational method which is based on the constructivist learning theory.

What do you mean by constructivism?

Constructivism is the theory that says learners construct knowledge rather than just passively take in information. As people experience the world and reflect upon those experiences, they build their own representations and incorporate new information into their pre-existing knowledge (schemas).