Hi, Beginner29. Here's my critique for you.

For the Arrows exercise, you should try to work on getting your perspective correct a bit more. I notice that the gaps between your arrow edges sometimes don't have much foreshortening to them, and neither do your widths of your arrows. Although there may be a small degree of foreshortening, you should try to exaggerate it a little more in order to show more depth. Remember to think of your page as a "window" to a world. Also, don't repeat your lines when you make a mistake. When you add line weight, only apply it to your overlapping edges. Keep your hatching lines tidy too, and straight across the form from side to side instead of diagonal. Keep in mind the curvature of the arrows you've drawn.

For Organic Forms, some of the instructions have been followed correctly. Just make sure to be aiming for smooth and confident lines - your lines shouldn't be wobbly. Again, don't repeat lines when you make a mistake. That only ends up ruining the flow in your work. You should take your time when planning and ghosting your lines.

For Texture Analysis, it's helpful to not think of your cast shadows as lines, but instead think of them as shapes. It can be better to draw the outline of those shapes first before you fill it in. In addition, don't scribble when drawing cast shadows either. When you scribble, you tend to rely on randomness or chaos. Instead, look for a rhythm and observe your reference more carefully. I see a few scribbling/hatching lines your third texture drawing, where instead you should have just filled those areas completely in black. This exercise is mainly about choosing effectively which shadows to draw, and that comes from observing things carefully. Also, try to be a bit more mindful of the gradient. Make the transition from dense to sparse more gradual instead of sharp.

For your dissections, similar ideas for textures apply. The curvature is quite good and you seemed to have taken that into consideration. I do have to say however that you should be more mindful of the light being casted onto the individual forms themselves if you haven't already. Don't draw unnecessary outlines, but instead only draw the resulting shadows. Also, you should add some line weight to the silhouette of your dissected forms.

For your Form Intersections, I think it's helpful to add some line weight to the silhouette of each form, although I think this part is optional. In addition, you should be sticking to equilateral forms as much as possible. Don't make forms overly stretched in a particular direction. Try to make the length of all sides equal to each other if possible, even for your cylinders. Some of them are overly stretched, and this forces you to think about foreshortening more, distracting you from the main purpose of this exercise (understanding relationships of how forms exist with each other in 3D space). When drawing ellipses, draw through them only two or three times (two is better). Don't draw through them more than that. As well as that, the perspective for your boxes is quite off, as there tends to be an excessive number of parallel and diverging lines. If you haven't already, you practice doing more boxes, and actually getting then critiqued. In the first page of this exercise, you were meant to only draw boxes.

For your Organic Intersections, think of each form as as actual water balloons, rather than just flat surfaces floating in 3D space. I see some of your forms that look like that they're going to fall off. Avoid this, and try to imagine what would actually happen to these forms in real life if you've placed them there. If they would fall off, then draw them at their resulting position. Don't make overly complex shapes either. Just stick to simple "sausage" forms for the time being. This means keeping each end the same size, and not making the forms taper from one end to another. When you're drawing cast shadows, be mindful of where you are placing them. Make sure it describes the surface it is being cast onto. Some of your cast shadows look like they are floating above the ground, rather than actually being on the ground. Also, some of them do not wrap around the forms they are being casted onto enough. Similar to the organic forms exercise, you should be mindful of the degrees of your contour curves. Try not to keep them the same size and instead follow the principles discussed in the organic forms exercise.