Hi, I'm Heiwa and I will try my best to Critique your work.

Lets start with Arrows: Your Arrows shows depth like it should. The ending and starts are of different sizes showing perspective. You have in-correctly shadowed the wrong side of the Arrow. Remember to shadow or darken the area which is bending in-wards to show distance. In Some places you have also done shadows on parts of the arrow's that are out in the open like in the first image and it doesnt make sense of how the shadow is present there. check this image here

Shadow.

Moving on to your Sausage Shapes: The sausage shapes are simple and the minor axis are mostly correctly aligned. What i see missing here is varying degree of elipses. Remember that this is not just an exercise of drawing elipeses within shapes but an exercise of thinking about how would the elipses look like based on the turning and the direction of the sausage. Think about rings inside those sausage shapes. Even for a front facing sausage you have some perspective. Here.

In your Texture study sheet: I see lot of random lines and sketches and plus lot of corrections made. To make texture analysis easier to understand is imagine if you take a paper and convert it into only black and white ( without grayscale). Based on the threshold set for the photo you will have blobs and shapes of either white or black. Small shapes ( similar to lines) are also possible. In the crumpeled paper analysis you have tried connecting the shadows using lines and even then there's sketching. This is seen in disections as well. I would advice you to practice this again.

Based on form intersection i see that hatching and line correction is common that you do. It is okay to be wrong in terms of proprtion and not being accurate. Accuracy comes from practice but the method should be correct. This is not the goal and should be avoided. Lesson one highlights this and they are foundations on all the lessons going forward , even for this one. The lines should be confident and single stroke. No correction and no sketching and no drawing lines without thinking about their placement. I would advice you to visit Lines and planes exercises from lesson 1 as well.

Dont let this critique de-motivate you but consider this as an exercise to move forward.