The Level 5 Textbook is the latest and most advanced edition of the Speak Lakota! series. It reviews and builds on vocabulary from Levels 1-4, while expanding into more complex grammatical areas. The Level 5 is a continuation of the style and communicative language approach of the Level 4 textbook. It helps the student not merely know the language through rote memorization of patterns, but through encouraging a process of discovery that internalizes the languages into the student's active language framework.