Help with title to old favorite!

[Mandi-chan]

When I was in the second grade, my teacher had begun (don't recall if we ever finished it...) reading this book to us about a man who lived inside a tree.

I think it was one of those huge trees that you could drive a car through, and he had managed to hollow it out on the inside and set up a home inside it.

I'd love to read it again, anyone happen to have any ideas on what it was called?

 

[darklotus]

This kind of sounds like My Side of the Mountain by Jean Craighead George. Its about a kid who runs away and sets up a home inside of a large tree and lives off the land.