This is an open invitation for any speakers of pt-br to join in this project to ease the learning of Brazilian Portuguese - the contents are even already laid out. Please feel free to contribute! The first lesson is complete; the second and fourth lessons are halfway done.
Note: The content is somewhat "stuck" for users not signed in (it displays one consistent version) since Wikibooks hasn't "reviewed it for accuracy" yet. If you have a Wikipedia account, you can sign in and I believe it will be updated.