Often troops recruit a new parent to serve on the advancement committee or on an ad hoc Board of Review. New parents often get eyes as big as saucers. Our troop has written a pamphlet with typical questions included. Another option is to offer the new scouter a chance to review some of the YouTube videos prepared by the BSA.
They can take 15 minutes to learn from YouTube Video from National on Boards of Review in general. More specialized topics on the subject are available on advancement from Scouting.org.
Don’t forget to have them review the Guide to Advancement section 8.
UPDATE 10/28/15: Here is an article on the “Do Nots”, too.