A Student's Dictionary is a great tool that helpeed me out. Includes Punctuation, Parts of Speech, the Dictionary and a Guide to the Dictionary, Periodic Table of Elemnts, Sign Language, Roman Numerals, Planets, Braille, Facts about Countries, Declaration of Independence, United States Facts and Biographies of U.S. Presidents, The Longest Word in the English Language, and much more. Reccomended for grade school, middle and high school students.