THIS SITE includes many Christian and Bible study courses that can be completed for free. They also offer "certificate" courses that do have a fee. One of the courses is a basic introduction to the major world religions and could be used as a primer to begin studying for the DSST Introduction to World Religions exam.
Good news in the Geography department. The book I'd found earlier online at Flat World Knowledge is no longer missing the pictures and graphics. It can now be used to replace the missing PASS textbook.

(Yay! Once again, the internet has not failed me!)