Confused about the PTCB
I took my exam Dec 2015. A co-worker needed to take hers this year, 2016. I had classes for mine through my previous job, so I circled the chapters in the text book to study from. I also gave her the study guide text full of questions. After her exam she told me that none of that content was on the test. These texts were recommended by PTCB website.
Another co worker has taken it twice, so I have been trying to understand about the new exam. I have heard there are 4 different tests. Does that mean that in any year you can get one of these tests? Does the content change from year to year? For example: what I studied for my exam in 2015 will be completely different from 2016, 2017?
Will she need to study different content when she takes it for the 3rd time in Feb 2017?
I find it hard to believe that the content changes from year to year. Please help me to understand!
Thank you for your time!