Really nice overall. I'll give you my usual "I'm super new at this" disclaimer, but for what it's worth:

Lines - strokes/ marks are generally smooth, confident. There is a lot of fraying on your longer marks in the super imposed lines exercise; Just probably means you need to mind your trajectory more.

Elipeses - Shapes all look pretty tight. You're filling most of the space and not overshooting boarders too much. You may have missed a full 2 rotations on some of your funnels, but it looks like you got most of them - I hope I'm seeing that correctly.

Organic Perspective - Wow, really ambitious attempt on these, and it mostly pays off - lots of boxes, good flow, shapes look mostly even. There are a couple of spots where you might need to re-consider the size of the box - about 1/2 or 3/4 through your flow line (starting from the foreground) some of your boxes look a little too big for where they are supposed to be.

Rough Perspective - These are rougher compared to the rest of your homework, but that was my experience as well. Your plot points are actually fine; Sure you missed the VP a lot, but so does everyone and you're not terribly far off (especially on your re-do). Your lines are more wobbly though, which is interesting when you look at how much more confident they are in your organic perspective.

Rotated Boxes - You noted that you 'messed this one up' on the imgur comment. That's true, but only because it is missing some of the key components that lesson seems to be teaching us. Your drawing isn't "bad", and still makes sense by itself, but because your boxes aren't spaced apart, and you appear to have so much superimposing, it's difficult to see the underlying construction.