At the Franklin Shield we discovered that the 3rd Gidea Park Scouts were particularly bad at knots. Our solution to this problem was to try to find a way to make knot tying a little more exciting for both the Scouts and Leaders.
Stage 1, each Scout needed to tie a boring knot correctly three times in a row.
Stage 2, each Scout needed to tie a loop correctly three times in a row before being allowed to swing from a tree on it.
Stage 3, Scouts that got this far had to tie into a climbing harness before climbing a rope up a tree. Knowing that getting the knot wrong could result in a fall focused the minds somewhat!