Once children have been presented with the facts of a subject, they should commit them to memory. Let us first look at the common sense behind this approach. Children have an enormous capacity for memorizing anything easily at this age. One would think that they were intentionally designed to be fact-magnets at this age. Children that have not been trained to dislike memorizing, don't dislike it.
Children love to memorize things and are very good at it.
Committing the facts they are learning to memory has important advantages. When something has been memorized, it is owned. It becomes theirs. It can be recalled at will, whenever the need for that information arises. Even most Christians and private schools see the value of memorizing Scripture verses.