Hi! Let's go one exercise at a time :)

Superimposed lined: nice pass-throughs, I don't notice any significant fraying but more lines and more variety in sizes would have been appreciated.

Ghosted lines: a bit of wobbling, but the lines stop at the end point nicely so nothing much more to say, there is just maybe too small of an amount of lines. Try to do more lines next time and don't hesitate to overlap them to really fill out the page.

Ghosted planes + ellipses: ghosted planes are great, nothing much to say, the trajectories are a bit curved at times but you can take care of that by ghosting in the opposite arc before drawing. Ellipses are round and stay nicely in the planes with little deformation between passes.

Funnels: be careful with your spacing and the size of your ellipses, the ones in the center tend to be squished and this can result in slanted minor axes. don't hesitate to make the funnel narrower and draw further outside the funnel as practice. Also you could try to do corner funnels as well if you can.

Table of Ellipses: some spacing issues here and there but nothing too concerning, other than that the ellipses are nicely round and consistent throughout the passes. Nice attempt!

Plotted perspective: really clear and nice looking, nothing to say

Rough perspective: a lot of boxes in each frame, which is great. You seem to have a bit of trouble with boxes that cross the horizon line but these tend to be harder for everyone. Same goes for boxes that are further away from the VP. Other than that a sizeable amount of them have coherent convergences near the VP. Your lines are a bit wobblier than usual in this exercise though. Great attempt still.

Rotated boxes: Your bottom faces (the smaller ones in the back) seem to lack a striking difference in convergence between first and second rotation for your upward and downward rotations. Corner boxes have coherent convergences for first rotation even though you could increase the change in angle for the lines that are converging toward the top or the bottom direction on both bottom and top faces. Second rotations are lacking a bit more in convergence, the change should be drastic compared to first rotation in corner boxes.

Organic perspective: nice scaling of your boxes to show the distance. You seem to be lacking a bit in diversity of shapes and initial Y drawn, as shown in the third frame of the first page. Please try to experiment with wider/shallower boxes next time. Most of your boxes have accurate convergences on all 3 VPs, which is great. A few things you could try next time is to play with lineweight for closer boxes and also try out-of-frame boxes.

Overall very good attempt with great execution of the majority of the exercises. I have no doubt that you are ready for the 250 box challenge. Hope my critique helps :)