Hello, I will be offering my critique of your homework.

Before I start, there's no problem sending lessons done digitally if you're not going for official feedback (although drawing on paper is recommended), just make sure you turn off stabilization.

Superimposed lines

It seems good. The lines are very smooth, continuous and without fraying on both sides.

You forgot to submit a page for this exercise.

Ghosted lines

You didn't send the page for this exercise either.

Ghosted planes

His lines are still good, with continuous tagetory and great precision.

Table of ellipses

Your ellipses seem to be slightly shaky, but it's not a big problem as their smoothness improves over the next few exercises.

They are drawn twice (nice).

It looks like you are actually ghosting, and trying to make the ellipses touch properly.

Ellipses in planes

In general, they are smoother than before and I see that you made an effort to make the ellipses meet the 4 sides of the planes.

Funnels

Your ellipses here are not so bad and you even align them with the central axis well.

Plotted perspective

Not bad. However, you forgot to add a vertical line to finish a box (I marked it here).

Rough perspective

When extending the lines, you extended them towards the vanishing point, but the correct thing to do is to extend them towards the horizon line (following the direction that the mark is traveling, and not correcting it).

As you did not send the other page of this exercise, do this exercise paying attention to what I pointed out.

Rotated boxes

It's great.

Some boxes follow the same vanishing point (here).

Organic perspective

It seems good. You will improve your boxes over time.