The Study Prep PDF's have all of the available (when created) reference material for each week.
The Large Print versions use the Large Print versions of the reference material, if there is one. The pictures from the standard versions are also added to the Large print version.
Starting with the week of 04-18-16 I am providing a set that do not have videos in them, for those with minimal data caps, or who simply don't want the videos.

The "Weekly Audio" file is basically an audio version of the Study Prep file, if you want to listen while you drive or whatever.
If you know someone who is blind or visually impaired, they may really appreciate the Weekly Audio file, so please consider mentioning it to them.

:^)