The history and geography pages have been checked and updated.
The links on all of the science pages have been checked and updated where needed.
All links on the General Information, Math, and Language Arts pages have been checked and/or updated.
Just to note: The DSST website has undergone an overhaul and now the links from this site to their exam outline pages are broken. These will be fixed in the next few days as the remainder of the courses are checked.