Have I Improved?

From this: 
 (last school year) 
to this:   (beginning of summer this year)  (mid-summer)
 to this:   (eww end of summer this year)

to this:   

    (this year)

I know that I will constantly improve with clay, and it's my main reason for being on this site.

But seeing drawing development has been tough for me. 

Has it just been the same thing over and over again? Or have any of you seen that I've gotten better? 

Just wondering. I'll still draw no matter what, I'm up for constructive critiscm. I'm not looking for a boost of self confidence, I just what to know if what I've done specifially to improve has helped.

Thanks to all of my watchers and those who have favorited my work! It means so much!
Peace.

~Gsdlover7