Practice Journal 2: Documenting The Practice Method

I first played measures 163 to 178 of Chorale and Shaker Dance without any practice at all:

Before

After playing the excerpt once, I practiced it for 15 to 20 minutes. I used a few different methods. First I tried playing the whole part over and over again just to get used to it. It worked up until a certain point when I realized that the faster I was getting, the more mistakes I was making and I forgot accidentals. Then I played the whole excerpt at a much slower pace, making sure to play every single note correctly. I then played it a little faster, and faster for many more times. If I ever made a mistake, I would only go back to that problem measure, or the few mistake notes and play it over and over again until it went smoothly with the rest of the measures. Then I would go back and play the whole thing over again at a faster pace. I also played the C scale many times, so that I could get used to the key signature and remember the correct notes. Overall, my method was to target the most difficult parts and try to make them even better and faster than the easy parts, so that they fit in accuracy-wise and tempo-wise with the whole excerpt.
Then I recorded myself playing it again after practicing:

After

My recording after a few minutes of practice was significantly better than the first recording. My tone quality improved a lot because I was more warmed up and had played the excerpt many times. I barely missed any accidentals or played any wrong notes. I also played much faster than the first time. Looking at the times, I realized that I cut off  a whole 12 seconds without even cutting short the excerpt! Playing it over and over again while slowly increasing the tempo definitely payed off. The rhythm was also more accurate and the articulation was much better. The slurs were played at the right times and the staccato notes were shorter. Overall, the short practice session made a big difference in my playing.