Autor: HERRERA, MARIO Editora: LONGMAN Ano: 2005 1ª Edicao 128 páginas
'Backpack' is a communicative-based series integrating the four skills (listening, speaking, reading, writing) with attention to grammar and vocabulary. Through a motivating mix of photographs, illustrations, stories, poems, chants, songs, reading, exercises, games, and projects, students learn to communicate in English about themselves and the world around them.