Bringing World Issues into Focus for All Students. The Global Issues series consists of books at three reading levels covering 12 of the most important geographic and environmental issues of our time. • Informational text for social studies and language arts classes • High-interest topics and dramatic photography • eBooks, sound effects, interactive vocabulary, and infographics • Three reading levels (on level, below level, and above level) to reach every student • Each topic and level is also available as eBooks and in Spanish (print and eBooks).