During the test window April 8-11, a total of 44 students took Test #3. The average score was 73 and the median score was 77 (half the class made 77 or higher). It's common for Test #3 to have the lowest class average for all the tests. However, the drop this semester is a bit more than is customary. If your grade fell substantially between the first 2 tests and the 3rd test, there may be lots of possible explanations. But the most common explanation is simply not spending enough time with the concepts. Hurried approaches to the topics in Part 5 don't work very well. You have to develop enough experience that you can pick and choose from the available techniques to find an approach that fits your question.