»Let's Learn Maori
A recent edition of Bruce Biggs's (apparently well-known and classic) text on learning the Maori language has some revealing sentences. To describe the conditional tense, the book proposes: "Whenever the Queen comes to New Zealand, the Maori people suffer a disaster."
And to illustrate the concept of ownership: "Please restrain your octopus. The fishermen are coming soon."
Te Taurawhiri i te Reo Māori, the official New Zealand site on the Maori language, has an interesting Flash-based interface.