Greetings Pikes , I reviewed your homework and here are my observations;

1 super imposed lines

it's consistent 

but lines suffer from *C* curve.

2 ghosted lines

lines are fraying in begining an at end

3 ghosted planes

taking a picture before you draw ellipses over planes is adviced. 

planes are constructed better with each attempt, that's a good start.

4 table of ellipse

gets better with each attempt

5 elipse on planes

consistent

6 funnels

major axis is slanted

7 plotted perspcetive

over shooting guidelines.

8 rough perspective

decent attempt

9 rotated boxes

very well executed 

10 organic perspective

draw boxes with varied dimensions if you may.

major take aways

fix the C curve in the strokes

if you are tired don't rush to the end of the homework. take rest and resume when recharged.