No it isn't required but it is a good way for the boys to go over the information. It has nothing to do with their earning the badge. Just another resource. But the site also has some other exams. When Kevin worked on First Aid. The exam he was given was from this site.
He liked doing it. They used both the scout book and the First Aid Work book.
your community is a tree. You are either a leaf that feeds it or mistletoe that suckes it dry. Be sure you are always a leaf.