Subject Outline Teaching is essentially trying to bring about changes in the capabilities of others. It is therefore logical that we might want to find out whether those intended changes actually occurred. So we observe our students' performances, we derive measurements from those observations, and we judge the extent to which our students have attained our intended learning outcomes. The procedures for doing this are labeled Assessment .
Teaching is also very much an iterative activity.
So there is an ever present need to gather information on how our teaching has fared, to use in reviewing, modifying, re-working for next time. This 'other' measurement activity, directed at the teaching itself rather than our students, is labeled Evaluation . Finally, the focus for our teaching is of course our students. But they do not come as 'blank slates'. They vary on a whole raft of things that can influence how they respond to our teaching.