Hello, DCRand:

I will try my best to point out everything to improve on your submission. I will approach this feedback session following the same structure as in the lesson: lines, ellipses and boxes.

Lines:

Confident lines with pretty good accuracy. Good job here, don't worry about the fraying on the end of your lines while adding line weight. This will improve with time and practice, aim for the perfection but don't stress yourself too much about it and you will eventually reach that point. Try to start in the same point you did the first attempt (avoid too many little points on where the line start), it's as bad as fraying but it's easier to fix.

Your ghosting technique seems solid, no complains. Be careful to don't forget about ghosting from now on, all content teached here is additive to the following so you are spected to ghost every single line. It's a common mistake to forget the ghosting method when doing more advanced lessons but you have to resist that temptation.

Side note: Your scans seems to have too much bright. Try to scan them with lower brightness next time, it could be hard for the reviewer to spot your mistakes if the picture doesn't show little marks or omits some strokes. The more quality your submission the faster it could be reviewed!

Ellipses:

Your ellipses are perfect! (In the context of these exercise) If you want to improve them a lot try playing with the stroke speed. You have to find the best phace for you. It's different for each person so you will have to try faster and slower until you reach a sweet spot. After finding that speed you feel comfortable with, you can build on top of it with warm ups using these exercises to improve.

Some ellipses are wobbly but i think it's not about "not enough confidence" but about your stroke speed so don't worry too much about it. If you start to face this problem too frecuently, try ghosting more and don't stop between the ghosting and the final stroke. The final stroke is meant to be like a surprise fake ghost, you do some ghosting strokes and then surprise yourself touching the paper in some random attempt without stopping the motion at all.

Boxes:

I don't have much to point out here. On the rotated boxes, the back face of each box is meant to be smaller than the front face (before having perspective in mind) so it should be even smaller when perspective is applied to them as they are far from the viewer. Also most of your back faces don't seem rotated and i think it is because you focused on making cubes instead of boxes. Remember, when we talk about boxes we don't expect to have perfect proportions (a.k.a cubes) and in this particular case the goal is to draw cut pyramids, the back faces have to be smaller than front ones so we could rotate the boxes forming a sphere like structure.

Also in the organic perspective I recommend you to always do the optional steps. They teach a lot with a little extra effort but are required as optional because that specific subject will be focused later. In this case is the 250 box challenge. It also teaches you to don't rush exercises and to have patience. You will need both skills to complete this long journey.

And that's all. I think you are prepared for the 250 box challenge. Go for it and don't rush! I would recommend doing 5 - 10 boxes a day, 20 a day if you are studying this full time. Most of the learning happens while sleeping and between days, specially on physical skills, so it's not going to be as worth as it could seem to rush through the lessons. Good luck and I hope my review has been useful to you.