Just to clarify for beginner scouts, A board of review happens from tenderfoot rank and above. This may be different for other scouts, but in my experience, there are three adults facing you. There is no need to be nervous, because they will simply ask you how you like scouts, what you think is good, what you think could improve, and some basic scout knowledge. To have a board of review, you will need to request one at a previous meeting, or, how I think is more efficient, simply email your the leader of your troop to request a BOR.