Below, I have linked you to different websites about Skara Brae for you to use in your research project. Rather than type lots and lots here, I've put some questions you should think about and ideas on how to present in a Word document.
The Orkneyjar website contains lots and lots of information for you to read and get your facts from, but I have also included websites with images of primary sources, videos and photographs of the site as it is now. There are a couple of links to apps (which I hope work on your devices!).
Finally, the 'Digital Dwellings' link takes you to an artistic, archaeological video created by 3 archaeologists with an interest in showing historical sites in a different way. It also shows you how video techniques can be used to create a piece of art.