Starting with your organic forms with contour curves, these are largely looking pretty good, but watch out for how you shape the end of your sausages. Right now they're not quite circular/spherical as instructed here. They're somewhat more stretched out, which adds a little complexity and can undermine the illusion of their solidity a little bit.

Looking at your insect constructions, I think it's quite clear that you improve a fair bit over the course of this lesson. Your last one, the grasshopper, shows a stronger degree of spatial reasoning skill and general awareness of construction than many of the other drawings that precede it, which suggests a good deal of growth. There are however a number of strong qualities throughout the set - for example, how you handled the segmentation on both the silverfish and the moth (the moth's is especially impressive given how much harder it is to see in the reference image).

There are also some weaknesses - for example, with the silverfish there are matters of proportion that tend to get thrown out of whack. It seems like you perhaps jumped into drawing it a little too quickly, ending up with two key mistakes - you fused the thorax/head into a single section, and then made it quite a bit too large. You also made the legs skinnier than they needed to be. That said, you rolled with these punches reasonably well. I don't see much in the way of panicking, or trying to correct mistakes. Instead you accepted what you could not change and continued to push forwards with the construction as a whole, ultimately drawing something that looked different, but still maintained some element of believability. Still didn't turn out great, specifically around the thorax area, but it could have gone much worse had you not handled those mistakes as you did.

Funnily enough, I'm noticing you putting yourself in certain difficult situations that aren't actually all that necessary. For example, with the black widow (whose reference image I can only bear to look at for so long), the legs are again a fair bit thicker than you'd drawn them. Drawing those sausages to be quite so narrow is actually quite difficult, and so by drawing them narrower you not only broke from the reference but also made things more difficult on yourself.

Also I can't help but see... a smiley face on the black widow's head? Am I imagining things?

One thing I really do appreciate about your drawings is that you tend to show a lot of respect for the fact that construction is all about putting forms down in 3D space, and accepting that they're present. I don't see any circumstances where you try and cut back across the silhouette of a form you've already drawn, to change its shape as though it's not already there. You do a good job of building on top of your constructions, step by step.

All in all I'm relatively pleased with your results, but because of how much growth you've shown over the course of this lesson, with a lot of different levels of skill visible here, it's a little bit difficult to fully peg whether you understand the concepts you're employing fully, or whether they're a little more tenuous. As such, I'm going to ask for just two more insect drawings, to get a full gauge on where you are right at this moment. Assuming they turn out as well as the grasshopper, I'll mark the lesson as complete at that point.