In the first 3 photos her skin looks noticeably pale in contrast to the warm ambient light. This isn't to say that you didn't get the white balance right, I just think that the contrast in temperature between the ambient light and the OCF light creates the illusion of pale skin. I would consider increasing the color temperature a bit to give her some healthier skin tones, especially if you're planning to use these to advertise senior photos, which in my opinion should represent good health and liveliness. If you're using off camera flash, you could look into using some CTO gels to help create lighting that better harmonizes skin tones with the warm color tones of the ambient light. Most off camera flash units are going to create white lighting without any modifiers, and often that color doesn't match the ambient lighting during golden hour.
Do you use any reference for poses? I like to keep a notebook filled with my favorite fashion magazine tearsheets. I use them for posing reference, lighting reference/inspiration, etc. It's especially useful when you're working with newer models who need extra guidance from the photographer for posing. These are nice shots, but she definitely looks a little awkward and a bit boring in her posing. Having some reference will help both of you get better looks for your portfolios.