Nice work on completing Lesson 2. Here's the critique:

Organic Arrows

Think of the curves of the arrows as folds. Many of them have a three-dimensional effect, but some, e.g., the right-hand arrows on page one, flatten out so they appear 2D.

Contour Lines

The forms look good. The ellipses align with the axes on the first page and the curves are properly overshot on the second page. Make sure to keep the forms even from top to bottom when you draw these for your warmup (see the form on the left-hand side on page one).

Texture Analysis

Your textures indicate shadow and contrast. They also transition well from left to right on the gradient.

Dissections

The textures conform to the rounded forms and break the contours, with an exception of the “brushed metal”. That one looks like it could be more rounded and break out more. Most of the textures are heavy in shadow. I recommend adding greater contrast so you can analyze the textures better.

Form Intersections

These look fine. Just remember to emphasize the intersections with darker lines. There is a rectangle of the bottom of page 1 which appears to have no intersections. Practice drawing pyramids during your warm-ups; they are somewhat disjointed on pages 2 and 3.

Organic Intersections

The forms have realistic weight to them and the shadows are shaped correctly. Recall that the 3D should be sausage-like. The top form under the smaller on the second page isn’t quite there.