Hey! Before we start, if you have an opportunity to change the lighting, next time, I’d very much appreciate it. It’s a little hard to judge these, as they are. Now, let’s see...

The lines look good! There’s the occasional altered trajectory in your superimposed lines, which is discouraged (continue onto the same course, even if it’s wrong, rather than course correcting!), but otherwise they look fine. I will recommend that you use start/end points for the non-diagonal center lines of your planes, though. All lines need start/end points.

Moving on, the ellipse section is fairly well done, too. I think you could push for your ellipses to be a tiny bit more confident, though. It seems like you’re a little too focused on having the second (or third) rotation match the first, but that’s not necessary- they just need to be confident. I notice a similar focus on accuracy in the ellipses in planes exercise, too. Here, the important thing is for our ellipses to be smooth, and circular. Touching all 4 sides of the plane is a secondary goal. Finally, in the funnels exercise, be careful that the minor axis cuts each ellipse into two equal, symmetrical halves (meaning: the ellipses can’t be titled!), and be careful that their degree (width), either remains consistent, or increases as they move away from the center- not decreases.

Finally, we arrive at the box section. Right off the bat, the rough perspective exercise is a little... well, rough, as you likely noticed from the correction lines. What’s likely happening is that you’re getting too caught up in what you think a box should look like, and forgetting about the point of the exercise. Because we’re working in 1 point perspective, the boxes are meant to look a little strange. ‘Fixing’ them, as you have, makes them incorrect. Instead, simply ghost every single depth line (there’s 4 of them per box) to the vanishing point, until you’re satisfied with it, then draw it. Placing a million points down is perfectly acceptable. Solid attempt at the rotated boxes exercise- it looks really nice. I do wish it was a little bigger, though. Finally, the organic perspective is quite nicely done, too, though I’d have liked to see a few more boxes.