Old Block, Chip Off

My boy's first grade teacher was presenting a brain teaser that went:

1 4 $
2 4 show
3 2 get E
go (cat) go

And she gave them a hint: this song was written by Elvis.

So my boy raises his hand and says "I'm sorry, but 'Blue Suede Shoes' was written by Carl Perkins, not Elvis Presley.

Search Amazon.com for Carl Perkins