ETD - Educação Temática Digital is an Open Access journal, which means that all content is available for free, at no cost to the user or his institution. Users may read, download, copy, distribute, print, search, or link to the full texts of articles, or use them for any other lawful purpose, without seeking prior permission from the editor or author, as long as they respect the Creative Commons license used by the journal. This definition of open access is in accordance with the Budapest Open Access Initiative (BOAI).