Mastering Astronomy Student Access Kit Author:Addison-Wesley MasteringAstronomy? is the most sophisticated astronomy tutorial and assessment system ever built. It provides the first library of activities and problems pre-tested by students nationally. Sophisticated analysis of the student performance data (including difficulty, time spent, and most common errors) has allowed every item to be... more » systematically refined for quality, educational effectiveness, efficiency of teaching and learning, and assessment accuracy.« less