Hi Shawn, welcome to Apple Discussions!
I personally believe you would probably be better off with MS Office. iWork will open up the Office documents (.doc, .xls, .ppt, etc.) and there generally are not any issues at all with compatibility of
text documents. However, the Powerpoint files can be difficult. If your daughter were to use Keynote (which can read and save to .ppt (Powerpoint) format, but she used some of the more advanced features of Keynote that Powerpoint does not have, then the slideshow will not transfer to a PC as seamlessly and the presentation will not look (on the PC) exactly as she designed it in Keynote.
For that reason, I think that you would be better off with Office. Your daughter will have seamless compatibility with Word and Powerpoint documents, and they'll look exactly the same on any PC as they do on your Mac, and vice versa.
adobe files, and .jpg photos are all that I'm moving over.
Both these files are readable by the Preview application on the Mac that is used for viewing images. You will want to import your .jpg photos into iPhoto to make it easier to view them. Just copy them to your computer, put them in your photos folder, and then start up iPhoto. It should scan the computer for pictures you can them import them.
--Travis