Britannica’s 21st-Century Explorer provides reference and learning tools for students who read below grade level, are dealing with specific learning problems, or are at risk of falling behind. This user-friendly collection contains all of the resources that students need including encyclopedias, an atlas, historic timelines, a dictionary, news, and other essential learning tools. 21st-Century Explorer is ideal for reluctant readers, ELL and ESL students, and adult literacy students.