This is really well done! There are some areas on this where you can improve though.

One thing I notice right off the back is the lighting. There are many areas on here that require much darker shadows. A tip my art teacher in high school told me is a lot of people are afraid to go too dark on their sketches, and it seems that might be the case here. If you take a photograph, and turn it into a gray scale, you will notice that some areas do require intense dark grays and blacks. To achieve this darkness, using dark pencils, such as 6B and 8B, along with charcoal, it can actually work out in your favor much better. Another tip I was told is always start with your dark areas; you may think it'd be the light you wish to start with, but when you start with the darker shades, you get a much better feel for control over the tool, and will find it easier to master the lighter areas. The human body may seem to the naked eye like it would have white patches for highlights, but far from it. If you turn it to full gray scale, then you will notice that there is nothing that is pure white. Everything is a shade of grey, even the shines in eyes.

Another thing I notice with this is your edges are rather sharp, and you can tell where you designed your outline due to this. Don't be afraid to blend out the edges a bit so they're not as sharp. In reality, humans are rather soft, and have no points, so I find that blending the edges where the outline is, is a really helpful trick, and really adds that sense of realism.

I must admit though, this piece is astonishing. The anatomy is done nearly perfect, and the hair is really defiant, which, might I add, is a really difficult thing to perfect, especially with curly or wavy hair for how many locks there are.

Keep up the amazing work, and I wish you the best of luck as an art student!

This is great work, but i think you need more darker shade on some parts. For example lines between arms and boobs. By the way reference work is great you can see on his study example of using darker shades, but still keeping those highlights.
Sorry for my bad english, I try my best :D