Hey, just went over you submission. Overall, I think you are well on your way to moving onto the next step.

Lines: I think you did an excellent job here. I can tell that you made sure to start at the same point for superimposed lines to prevent any fraying. I think that most of the ghosted lines and planes look good, too. One thing I would focus on during warmups is drawing lines more confidently, especially the ghosted lines. There are a few lines per page that are wobbly, especially at the ends towards the dots you are drawing to and from. This will come with practice, especially with the 250 box challenge, so make sure to incorporate these into your warmup. And make sure you are using your shoulder as the pivot, and not your wrist or your elbow.

Ellipses: You did a solid job on these. Most of the ellipses look confident in all three parts. A few had a bit of wobbliness to them, and a few others did go out of the boundaries, like the ghosted planes or the table of ellipses, but these are slight exceptions to an overall good job.

Boxes: The plotted perspective looks amazing. The rough perspective, as well as the rotated boxes and organic perspective, are great and show potential for improvement. One thing I would consider working more on is confidence in lines. In the rough perspective and organic perspective, there were instances where you drew over the same line more than once. I've done this before, too, usually because I'm unsure if it looks good. Remember that once you draw a line, stick with it as best as you can, even if it is unintentional. Another thing is that in the organic perspective, there were a few boxes that were off the swoopy line. You don't have to do a revision of this exercise, but just remember that the exercise is there to help with gaining perspective. As far as perspective is concerned, I know you're going to do well in the 250 box challenge. I can see the foundations there in the latter three exercises. I especially see this in the organic perspective, where you did a good job of rotating the boxes. There are instances in the latter three exercises where you miss the vanishing point, but this is something that will get better as you go through the box challenge.

Overall, I'm satisfied with your work. The main thing I would recommend shoring up on is confidence in your lines. When you warmup for the 250 box challenge, I would recommend ghosted planes and plotted/rough perspective. You don't have to do all theses during one warmup session, just one per session. Good luck!