Good job completing the box challenge! You did a great job and looking at your boxes over time, you had a great deal of improvement.

I can see a lot of care in your mark making and your boxes are very clean. Going through your boxes there are a few things I'd like to point out. Overall you did a very good job following the instructions. But after the first few pages you start to add more and more boxes per page. Normally you want to keep your boxes at around 5-6 per page as stated here. This allows you room to get the most out of ghosting and drawing from the shoulder. Smaller boxes don't really allow for this as easily and may cause you to rely on your wrist and elbow more than we want. It also makes it a little more difficult to grade your boxes with all of those extensions cutting into each other.

One of the bigger things I noticed is that there is not a lot of variation to your foreshortening. Most of your boxes have a similar rate of convergence. In the future, when you do warm ups, you should consider varying your foreshortening more so that you can gain more experience with that.

As you move forward you might notice that some of your four lines don't always converge towards the same vanishing point. As you begin to build your boxes try to think only about the lines that share a vanishing point. It is easy to get distracted by the other lines that make up your box. When you build your boxes, don't focus on things like the back corner of your box for instance. You want to examine the angles between the lines to help you better understand where to place them and why. You can use this diagram to help you with some of the subtler issues.

Overall, your boxes look great. They are all very clean and well thought out. You definitely grew a lot by the end of the challenge. The main thing I recommend is to draw bigger boxes in your warms ups to get more practice with your shoulder and do use the diagram above to help you think through some of your convergences.