1,3,4,6, pretty solid. Some of your best work I have seen! Good color, consistent color, tasteful posing. I think the "talls" could be re-cropped a bit...that large dark space in 3 and 4 is a bit too large and is making the shots a wee bit off-balance. Still, though, yeah...you're turned in some decent pics here!
#5 is my favorite by far. It could use more defined catch lights in the eyes and it cuts her right elbow off but I feel it gives off the most emotion and connects you with the subject the most. I also like #2 for similar reasons but her hair is killing it. You should bring a spray bottle of water and a clean comb to your next shoot. A couple mists and a quick run through of the hair would make a huge difference in these.
Fresh opinion here, haven't seen any photo before! I like what I see, would only add for you to keep an eye both when shooting and on after process to the straiten of the photograph. Verticals and horizontals will certainly make a huge diference on the results. This may seem to picky, but try and look again, you'll realize what I'm saying.