Brad M.,
The photos you posted look very pleasing, overall. She has a good eye. Don't forget to shoot vertical too.
The photo of the girl is very pretty and fun to look at. It seems to tell a bit of a story. It looks like she might have been eating some snow. Fun. I also like the sepia tone of the image.
As a portrait, the snow on her face is a bit distracting. Snow on the clothing would be fine. Portrait lighting takes some work. She has some light coming from behind her, camera left. This is a great start, but needs to have another light coming from her fron, camera right (very basic portrait lighting).
Lighting is tough, but it is worth it.
I don't mind the head being cut off at the top of the frame, and being made as a horizontal image. It is more calm this way. It could have been shot as a vertical, with a bit of space above her hat, and the image wold feel more active, and dynamic (just how our brain responds to image shapes).
This is an interesting image. I like the simplicity of it, the shallow depth of field with the resulting soft background. The chain (subject of the image) is a bit out of focus. The very bright spots from the direct sunlight are a bit of a problem too. It is too bright for this image, and makes it feel harsh. Wait for a cloud to block the sun, or hold up a scrim, to soften the high contrast light, miking a very pleasing image to hang on the wall.
This image has a soft feel to it. Very nice. The contrast between the light background and the leaves is nice. Some photographers would like the leaves to be a bit lighter than the background, since they are the subject. You eye is drawn to the lightest part of the image (not the subject in this case). But you eye is also drawn to the area of highest contrast (the edge of the leaves).
Very nice except for the very blurry leaf in the lower right. Don't be afraid to prune leaves (on your own trees), to get the exact image you are looking for.