Hi I'll critique your homework.

Starting with the arrows I see that they are confidently drawn, but remember to be more subtle while applying lineweight, stick to this.

Now the contour ellipses exercise, I see that you kept in mind to see shift the degree of the ellipses, one thing I would recommend is to use as many ellipses as you consider right, a few well placed ones will do even better than trying to fit in as many as possible, the same goes for the contour lines.

Regarding your sausages they are very well drawn, and consistent. Remember to keep experimenting with these exercises.

Now in the textures analysis exercise I see that you're focusing largely on negative and outlines, remember to ficus on cast shadows, focusing on this negative spaces makes it harder to create a gradient and focal points which we could use to draw the viewers attention. Be sure to go over this.

This is something that also shows up in the dissections exercise.

Now the intersections, this exercise is just meant to get students to start thinking about how their forms relate to one another in 3D space, and how to define those relationships on the page. We'll be going over them more in the upcoming lessons. Your forms are looking quite solid here and they believably appear to belong in the same cohesive 3D space.

And finally you did a great job on the organic intersections, the only observation would be that you try to push the cast shadows further and wrap them around the other sausages.

So I'll mark this lesson as complete.