On the advancement trail, a Cub Scout progresses towards a badge of rank based on their grade. They need not have earned the previous rank in order to earn the next.  Each of the ranks in Cub Scouting has its own requirements that are age appropriate, so earning a rank below a Cub Scout’s current grade is not permitted. As a Cub Scout advances through the ranks, the requirements get more challenging, to match the new skills and abilities they have learned.