No one, and I mean, no one can learn (and enjoy) words without a great dictionary. And yet, so few of the homes in which I teach have a dictionary.
Now, I have the unabridged Oxford English Dictionary which takes up several feet in my library. Yes, a luxury.
And yet, for a good source of knowledge about words, nothing beats a good, solid dictionary.
Here's voting for a "dictionary in every house" campaign.