Constructivism as a Referent for Teaching and Learning

Von Glasersfeld (1992, 5) noted that

from the beginning of the 5th century B.C., the skeptics have shown that it is logically impossible to establish the “truth” of any particular piece of knowledge. The necessary comparison of the piece of knowledge with the “reality” it is supposed to represent cannot be made, because the only rational access to that reality is through yet another act of knowing.