What's the best method? Having them learn it by rote? Well, it's effective. There are people well past retirement age who can reel off poems which were drummed into them before they'd seen their first Anderson shelter. But drilling poetry into children parrot-fashion can also put them off the stuff for life. Alternatively, one could analyse a poem, take it apart and tease out the varying levels of meaning along with the techniques used, but that runs the risk of making a poem seem like a cryptic crossword, a puzzle or exercise rather than an intimate means of communication.