Encyclopedia Britannica 2009 Student & Home Edition [Old Version] The most complete reference source for students and adults--3 encyclopedias in one (Elementary, Student, Adult); Britannica's Ultimate Reference Suite with student features. 100,000+ authoritative and richly illustrated articles; 166,000+ Web links and biographies, dictionaries and thesauri, timelines, and interactive multimedia Thousands of new engaging videos, photos, audio clips, magazine and Web links to keep students interested and motivated to learn Hundreds of interactive study guides, exercises, and learning games designed to help students understand math, social studies, and science concepts; suitable for multiple grade levels Comprehensive Homework Help--interactive lessons & "How to" documents to help students excel in school; also includes Britannica Test Prep--improve your ACT & SAT scores