He also noted that, while such assessments “may be graded and used as part of the judging and classificatory function”, it is much more effective “if it is separated from the grading process and used primarily as an aid to teaching” (p. 48). Assessment is central to effective learning, therefore, because even if learners start in roughly the same place with respect to a particular piece of learning, they will very quickly be at different places due to the differences in what they have learned. In other words, assessment functions as the bridge between teaching and learning.