A training class is definitely a good idea. If you do not have a copy of Welding Inspection Technology (the AWS seminar text) I would recommend buying it and the workbook now. The modules are the outline for the examination. I have training manuals going back to about 1975 and WIT is the easiest for students to follow. I also use WI-80 and it may still may be available from AWS.
I agree with your approach to teach practical information, however there is a certain philosophy regarding the testing process. The Body of Knowledge is helpful since it lists the approximate number of questions on each subject. For examination purposes you would spend more time on definitions than safety. In the real world of welding, safety is more important than being a walking dictionary.
Persons taking professional examinations (college examinations, bar examinations, nursing examinations etc.) will usually spend some time reviewing the testing process. Just the nature of the CWI examination (multiple choice questions, time limits, reference materials etc.) always rattle a few people.
Check out some of the older posts on this forum in the Certification and Qualification section regarding the CWI examination and you will see what I mean. However if you still want to put together an outline you are at the right place and are asking the right people.
contact me via email, I am a teacher and train teachers for the CWE and CWI. I will be glad to help you.
Don Murrell CWE/CWI
GCCC/GCHS AWS SENSE WELDING PROGRAM
Garden City, Ks 67846