Welcome to drawabox. Let’s take this one exercise at a time, shall we?

Starting with your superimposed lines, these are looking good. They’re smooth, properly lined up at the start, and of a consistent trajectory. Your ghosted lines/planes are looking quite confident, also. I’m certainly glad that you’ve not (like most students), forgotten to plot start/end points for the non-diagonal center lines of your planes. That said, a lot of the time you’ll be a little too conscious of these lines, and arc to meet them. Remember that the resulting line being smooth, and straight, is more important than it being accurate.

The table of ellipses exercise is a little mixed. Some of your ellipses are fairly confident throughout; others start off a little stiff, before stabilizing in a further rotation. Assuming that you’re diligently ghosting, as you say, then my advice would be to not stress about the result. Likely, you’re stiffening up in the little time there is between deciding to make contact with the paper, and actually making contact, causing your line to start off shaky, but then gain confidence as it goes along. One thing you may consider is closing your eyes as you execute. After all, the eyes shouldn’t guide the line, anyway – the muscles should. See if that helps; then slowly transition to opening them again. The ellipses in planes improve upon these issues, despite their more complicated frames. The funnels, too, look alright, but it’d have been nice if either the ellipses increased in degree, or their degrees were a little larger to begin with.

The plotted perspective exercise looks clean.

The rough perspective exercise is not quite there yet, but I can see that you’re doing your due-diligence, from the many points on the page, and the result does improve throughout the set. Still, I’ll request that you not trade the back lines parallel/perpendicular for them heading to the VP. They should do both.

Solid attempt at the rotated boxes exercise. Some quadrants are stronger than others, but that’s perfectly fine, and even good, as it indicates that you’re constantly trying to improve upon your previous attempt. Really, the only issue here – the occasionally incorrect far planes – comes from our insistence that you stick close to the neighboring edges, right or wrong. As you progress through the box challenge, and develop an understanding of how they should behave, and why, you’ll be able to make some more informed decisions there, so hold out until then.

Save for some overshooting issues (I wonder if you’re plotting start/end points to denote the direction, but not the length of the lines, here – if so, it should be the latter!), the organic perspective exercise looks nice. The size and foreshortening of your boxes do a solid job of communicating the flow we’re after.