I believe they will need the Interactive Viewer software. It is a free product which can be found here:

PC
http://smarttech.com/Support/Browse+Support/Download+Software/Software/SMART+Notebook+Interactive+Viewer+software/SMART+Notebook+Interactive+Viewer/SMART+Notebook+Interactive+Viewer+Windows

Mac
http://smarttech.com/Support/Browse+Support/Download+Software/Software/SMART+Notebook+Interactive+Viewer+software/SMART+Notebook+Interactive+Viewer/SMART+Notebook+Interactive+Viewer+Mac

Please let me know if this does not solve their problem.