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

1 super imposed lines

short lines are quite good,

but extended lines suffer from *S* curve.

2 ghosted lines

very little overshooting,

long lines still have curves.

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

second stroke is consistently shortter than first one,

try not to tighten the arm in attempt to follow the previous path of ellipse 

6 funnels

don't make the funnels too convex

7 plotted perspcetive

good as supposed to be.

8 rough perspective

decent attempt

9 rotated boxes

if an mistae is made don't redraw over it to fix it.

10 organic perspective

draw boxes with varied dimensions if you may.

major take aways

fix the S curve in the strokes

don't over draw to fix mistakes

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