Use a service where artists hang out like
https://www.coroflot.com or
deviantART: where ART meets application!
Do not build a website on your own.
You want a neutral presentation for her work.
If you are asking the question then you do not have the skill set to create something that will present her portfolio in the appropriate manner. That's not a diss, just reality.
You will overdesign it and probably use blink.
Her work needs to stand on its own and that is best done in a bare/blank environment. Just like an art gallery with blank white walls.
If her schools of choice have not heard of deviantart.com then she does not want to go that school anyway.