Lines:

Your lines demonstrate that you can draw confident, straight lines from your shoulder. Your Ghosted Lines/Planes exercises show good accuracy too, great job!

Ellipses:

Your ellipses are also drawn consistently and confidently. Since you demonstrate good confidence and consistency between the first and second trace of the ellipse, I believe that you are ready to start focusing more on accuracy/shape of your ellipses, specifically in the Tables of Ellipses and Ellipses in Planes exercises. Your ellispes in the Funnels exercise generally seem more symmetrical than your ellipses in the other exercises.

Boxes:

Maybe something happened when you were uploading your work to Imgur, but I only see your Plotted Perspective and one page of your Rough Perspective exercises. I will finish my critique for the boxes section after I see the second page of Rough Perspective, the Rotated Boxes exercise, and two pages of Organic Perspective.