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Built in educational templates. Compare and Contrast, Venn Diagrams, etc.
word pronunciation in many languages
Web 2.0 - parental Control feature, which you can use to filter adult content, region, file type, license and language filters, to make sure you find exactly what you're looking for, and you're even able to search through the search results to really get what you're looking for.
Students, teachers and parents can enter spelling lists. This site pronunciates the words and puts it into a sentence.