Opportunity to Learn and Achievement in Three Subject Matter Areas.
In surveys of educational achievement some teachers frequently complain that a centrally constructed test underestimates the real achievement of their students, since they did not have an opportunity to study topics covered by some items. An attempt has been made to find out the relationship between opportunity to study a topic or skill in the school and proficiency in it. It was found that such relationship exists; nevertheless the rank order of a particular class is not really changed when assessed on those items only which they studied in comparison to their rank order on the total test score.