Assessment: Teacher-centered or Learner-centered?

I think there were two statements that should not be examined separately. The first is the following: Assessment is used to monitor learning. The second is the following: Assessment is used to promote and diagnose learning.

A definition of the verb monitor is the following: To keep track of systematically with a view to collecting information (http://education.yahoo.com). It is essential to quality instruction that you monitor student progress, especially if you are teaching something like reading that is a continuum. The assessment should consist of all aspects of the area. Therefore, someone dates and records the complexity of the material the student read, at what rate they read it, with how many errors, what strategies the student used when they didn’t automatically know the word, and their understanding of the piece. This assessment information is used to diagnose the student’s strengths and weaknesses. This is monitoring a student’s progress to promote and diagnose learning. The statements identified earlier are not separate entities, they are parts of a whole.