Does he have a learning problem, or difficulty understanding what he's reading? I personally would probably try to walk through the existing training with this person, depending on the circumstances. I find I've probably spent more time looking for something online when I could have just "created" it myself in less time!
I am thinking this may be a case where Human Resources or your Education/Training Department can assist. This employee may need an accommodation of some sort and covering the material verbally and testing the person verbally may be needed. HR would be able to provide guidance, however.
Denise M. Reed, MS, RHIA, CHC
Director, Health Information Management
Illinois Valley Community Hospital
925 West Street
Peru, Illinois 61354
(815) 223-3300 ext. 3471