C&C per req:
In the future, please number your images to make critique easier.
Since there are so many, I'm not going to comment on each image, but rather make generalizations.
The first thing that strikes me is that this young lady hasn't had much experience as a model; she seems very stiff, and while the ideas for the poses are good, they don't appear natural. Additionally (and I think most importantly) there are many where she's looking away from the camera. You don't always want her looking straight down the lens, but generally at least toward the cameara.
In the first group (On the grass by the river/lake) There are two issues. (1) is the lighting which looks to me like a single on-camera flash resulting in flat, boring light, and under-exposed images and (2) is the DoF; there's way too much of it. We don't care about the buildings in the background, we want to focus on the model. Unfortunately, all your EXIF data is gone, so I don't know what settings were used, but I would suggest opening up much wider. You want the model in sharp focus and the background a soft, somewhat amorphous blur. Lighting I think should have been at least two strobes, and probably a reflector as well to provide more even coverage. I'm not a big fan of this sort of work at this time of day, because of how difficult it is to make you lighting look natural.
The second group (Palm trees, wearing blue top) are better; the lighting is more appropriate and doesn't look so synthetic.
The last group (Red shorts, striped shirt) I don't really like at all; the combination of the clothes, the high-heel shoes, and the poses/location all say one thing to me. If this was the look you were going for then, well done, otherwise, I don't think they're good shots; technically they're fine but...
One other important area is that of cropping. Many of these images have small bits cropped off. Finger-tips, toes, etc. For example, #s 35 and 91 are both missing fingertips. It's fine to crop limbs, but not at joints, or "little bits" which rather make one think that the photographer wasn't paying attention.
All of that aside, I think you've made a heck of a good start. With a little more lighting, and a little more practice for both you and the model, you'll be turning in some top-notch images.
Just my $00.02 worth - your milage may vary.
~John