What, exactly, would you like to know about the CNIB course/exam? The course is 11 exercises. Once the exercise are completed (through self-study) an exam can be requested from CNIB. They send the test out (with instructions) and, if it is successfully completed, a certificate is available. This is for those who already know braille and there is no cost. I have taken this course/exam.
There is also a course/certification test for those who don't know braille yet. That course is a full course (about double the number of lessons) and costs $500. Once the course is completed, an exam can be requested and again, if successfully completed, a certifice is available.
If I have not answered all your questions, post again!