Catastrophe definition, a sudden and widespread disaster: the catastrophe of war. See more.
1 Total Time: The computer-delivered GRE takes 3 hours and 45 minutes for the average student.  Experts recommend sitting for the GRE exam one year prior to entering graduate school. This allows for ample study time and the option to retake it if desired.
You must complete all of the 6 GRI classes. Classes may be completed in any order. Each class is two days long, and a test is administered at the end of each class. Students must receive a 70% on the exam to receive credit towards their GRI designation. Students may retake the exam if necessary. You have 5 years from the date of your first class to complete the designation.