I've noticed recently that many certification articles/books written for certification NONexperts assume a fairly sophisticated understanding of certification/testing concepts which (duh) if the individuals already had, they wouldn't be reading the piece.
Here's my current favorite written to explain the test development and scoring process for individuals certified in a healthcare profession (org name witheld to protect the "innocent"):
"The scaled scores are not a "number correct" or "percent correct" scores. Raw Scores are arithmetically transformed into scaled scores. This conversion involves a simple linear transformation of raw scores (x) to scale scores (s) that takes the form of Total Raw Score times zslope plus zintercept."
The worst part is that this is literally the last sentence of the written piece. Not exactly the note I'd like to go out on. Check your written materials for readability (for the audience targeted - not to you!)