At the same time, during these practice, teachers (and tennis coaches) are indeed observing students'performance, possibly taking
measurements, offering qualitative feedback, and making strategic suggestions. How did the performance compare to previous performance? Which aspects of the performance were better than others? Is the learner performing up to an
expected potential? What can the learner do to improve performance the next time? How does the performance compare
to that of others in the same learning community? In the ideal classroom, all these observations feed into the way the teacher
provides instruction to each student. (See Clapham, 2000, for a discussion of the relationship among testing, assessment, and teaching.)