Lines

They are generally good and they improve over the set; it looks you always focus on confidence over accuracy which is awesome! However, there are a couple things you could work on.

There’s a little bit of fraying of your lines when you go over them specifically in the superimposed line. Fraying at the end is normal, but there shouldn’t really be any at the starting point so try to be mindful of starting at the same point every time.

Your lines are arching a bit, so just make sure you're using the shoulder pivot. If you're still having difficulty while doing the pivot, you can try to fix it by trying to arch consciously to the opposite direction.

No matter how off a line is, you shouldn’t repeat it, you should keep the line as if it were correct and move on. It looks like for most of your exercises you did a great job of not repeating however for the rotated boxes it looks like you repeated lines a lot. The instructions do say to superimpose a line to make the box outline clear but that should only be one superimposed lines. Your outlines are too thick and with too many lines it becomes hard to evaluate how your line quality is improving.

Ellipses

Here as well mainly a good job.

On the ellipse tables, keeping the ellipses should be kept within the bounds, each ellipse touching each other, without overlapping. Again though your prioritization of confidence over accuracy is great, your accuracy will improve with practice.

On funnels, some of your ellipses look a little wobbly. Just like with lines, the ellipses must be drawn confidently, prioritizing confidence and smoothness, over accuracy, so try to draw them a little bit more confident like on your table of ellipses.

Boxes

Again, generally solid work, I only have a couple critiques to help iron out small issues.

On rough perspective, width lines should be parallel to the horizon and height lines perpendicular to the horizon. I know this can be difficult, but try your best to keep them aligned.

On rotated boxes, your boxes look very well aligned. I'm not sure if you used a ruler or not as you've demonstrated some pretty straight lines but these boxes are pretty different from your organic ones. All the boxes for this exercise should be drawn freehand using the ghosting method as stated here: https://drawabox.com/lesson/1/16/step1. If they were free handed, awesome job! If not, just make sure to read the directions carefully for the exercises so you can get the most out of them.

Organic perspective have a few perspective issues, but generally look pretty nice, and you'll be doing 250 boxes next which will really help with that, so no need to worry about that.

Overall though nice job! I've outlined the next steps below.