Someone talk me off a ledge. We just got our AP Test Scores. WTF?!?!?!!? I've been teaching AP Statistics for 3 years now (after teaching Not-AP Statistics for about 8 years), and I know I've been doing a better job each year.
If you don't know, the AP Test is scored from 1-5 (5 being the best). The test is really hard, but you only need about a 65% to score a 5, 50% to score a 4, 40% for a 3, and 30% for a 2.
Year 1 (24 students)
1: 20.8%
2: 37.5%
3: 33.3%
4: 4.2%
5: 4.2%
Mean: 2.333
Year 2 (52 students)
1: 44.2%
2: 13.5%
3: 17.3%
4: 17.3%
5: 7.7%
Mean: 2.308
Year 3 (70 students)
1: 64.3%
2: 21.4%
3: 12.9%
4: 1.4%
5: 0.0%
Mean: 1.514
In year 1, I was very unclear about the points of emphasis in the grading, so I understand the lack of student success. In year 2, enrollment increased, therefore average quality of student went down, so I understand the decrease in means from 2.333 to 2.308. From years 2 to 3, again, enrollment increased more, and the average quality of student decreased more, but 1.514? I don't get it.