Reading the Bible everyday (and other old, good books like the Pilgrim's Progress) to first graders definitely helps to expand their vocabularies.
About a month ago, Gorilla* raises his hand.
"Mrs. Robinson, behold..." he solemnly says as he points his work. We read the word so often, I don't think he knows it is outdated.
*Don't forget this is a pseudonym; you can see his pic below.