Hi I'll be reviewing you're home work hope it helps

Lines: First of all with you're lines I notice that you're lines tend to arch and wobble slightly this is because your either not drawing using your shoulder or you simply not used to drawing with you're shoulder you can turn the page to find whatever angle is most comfortable for your arm. Also for arching lines you can try sub consciously think about drawing the line in the opposite direction it tends to arch and it usually balances things out.

Ellipses: I can see in your tables of ellipses the ellipses tend to be either too small or too big as well of there being cases there the ellipses overlap I would recommend ghosting you're ellipses more to get a better feel for how big they should be.

As for your planes of ellipses I can notice your ellipses aren't drawn with confidence while you should try to make you're ellipses fit within the planes you're main focus should be on drawing the ellipse smoothly. For your funnels of ellipses it's pretty much all the same advice I said about your tables and planes of ellipses.

If I had to add anything I can notice some of your ellipses don't aline with the minor axis you should try to make sure the ellipses are even as its the main way to know if your ellipse is correct or not.

Boxes: For your rough perspective I can notice some of you're lines are diagonal which is incorrect. You're horizon lines should be parallel to the horizon line and your vertical lines should be perpendicular to the horizon line don't worry much about them going back to the vanishing point as long as there close there good enough.

For you're Rotated Boxes the first thing I'd recommend is to add some line weight on the faces of your boxes as its hard to tell where one box ends and one begins. You're rotating are off what I usually do it before I draw a box I'll use the ones that are close to it as a guide for example if one of you're boxes is rotated by 40 degrees the boxes above and below it will also be Rotated by 40 degrees. Don't feel discouraged as this is easily the hardest exercise in lesson 1.

Finally your Organic Perspective can notice your boxes tend to converge incorrectly for example on you're second organic perspective post at the bottom we see the top of your box implying that it's we're looking down on it so the planes on the side should converge away from the viewer aka the bottom of the box should be smaller.