1. **State the problem:** We are given test scores for two classes, 2009 and 2010, and need to determine which class has more students. 2. **Count the number of students in each class:** - For the 2009 class, count all the scores listed: Scores: 9, 8, 8, 8, 7, 6, 6, 6, 6, 8, 5, 5, 3, 3, 3, 2, 2, 0, 0, 5, 1 Number of students = $20$ - For the 2010 class, count all the scores listed: Scores: 0, 0, 0, 1, 2, 4, 4, 4, 4, 5, 6, 6, 7, 8, 9, 0, 1, 2, 2, 2, 3, 4, 5, 5, 6, 7, 3, 8, 0 Number of students = $29$ 3. **Compare the counts:** - 2009 class has $20$ students. - 2010 class has $29$ students. 4. **Conclusion:** The 2010 class has more students than the 2009 class. Final answer: **2010 class has more students.**