post reading comprehension scores

Reading comprehension

Pre-Test Post-Test
1 - 100% 3 - 100%
4 - 93% 4 - 93%
4 - 86% 3 - 86%
4 - 80% 3 - 80%
2 - 73% 4 - 73%
8 - 66% 3 - 66%
6 - 53% 2 - 60%
1 - 40% 6 - 53%
1 - 26% 2 - 33%

For the pre-test 15 out of 30 students passed with a "C" or better.
For the post-test 17 out of 30 students passed with a "C" or better.

I expected more students to score higher on their reading comprehension.
Although their test scores didn't show an improvement on reading comprehension, I noticed that their reading strategies and skills improved.