You needed to do 2 Superimposed Lines exercise but I am not holding you back for that, also your markmaking in the Ghosted Lines make sure to start on the dot and you should be good. The Ghosted Planes look good.

You outdid yourself on the Tables of Ellipses. you did'nt need to do 3 Ellipses in Planes but sill well done! make sure to draw the elipses multible times without picking up your pen. You did well on the funnel but make sure your elipses are closer together, and that they are less wide when they are towards the middle and that you leave room for line in the middle of the funnel. 

In the Rough Perspective exercise make sure the face of the box that is closes is the same shape as the furthes one just smaller. In the Rotated Boxes exercise you need to keep your boxes together more and make sure to complete a full loop on the out side layer. the Organic Perspective looks good