General

Internet Public Library Kids' Space
Search for your subject and get a list of resources chosen by librarians around the country.

Internet Public Library Teen Space
Links to topics and resources specifically of interest to teens.

Teen Book List on GoodReads
Recommendations on books to read.

CK-12 Foundation
An online collaborative learning environment for students and education; offers study guides for STEM (Science, Technology, Engineering, and Math) and assistance in curriculum development.

Digital Public Library of America
The DPLA offers a single point of access to millions of items--photographs, manuscripts, books, sounds, moving images, and more--from libraries, archives, and museums around the United States.

Encyclopedia of Life
The Encyclopedia of Life brings together information about all life on earth - text, images, video, sounds, maps, classifications, and more.

Find Sounds
Find audio files in a variety of formats for animals, musical instruments, and miscellaneous sound effects.

Khan Academy
Khan Academy has over 3,300 videos on everything from arithmetic to physics, finance, and history and hundreds of skills to practice.

Where to Write for Vital Records
Links are provided for users who want direct access to individual state and territory information.

Civics

Ben's Guide to U.S. Government for Kids

Choose a grade level then look around for information on how the U.S. government works.

Civics and Government
Resources located under Civics and Government focus on the relationships between governments and individuals, and international relations.

What is a Dollar Worth?
CPI and inflation rates. Download the free Inflation Calculator app.

English

Merriam-Webster Online
How do you spell that word? And what does it mean? Try this famous dictionary and thesaurus for help.

Resources for Writers - the OWL Handouts
Grammar, spelling, parts of speech, and more.

Project APA
An abridged APA source citation website. The goal is to reduce the scope of APA style/formatting instruction while maintaining its essential elements. Students who need the basics of APA--a place to find a quick answer to oft-used sources, both print and electronic--will find this site useful.

BibMe
The Modern Language Association Handbook is in its 8th edition and standardizes the way scholars document their sources and format their papers. It also helps you with APA and Chicago.

Thesaurus
Thesaurus.com is the world’s largest and most trusted free online thesaurus brought to you by Dictionary.com. For over 20 years, Thesaurus.com has been helping millions of people improve their mastery of the English language and find the precise word with over 3 million synonyms and antonyms.

Accelerated Reader Bookfinder
Locate approved titles for use in school Accelerated Reader programs. Check with your student's teacher or school for specific details and approved AR lists.

Geography

United Nations
Information about the United Nations, global issues, and information about UN member countries/states.

Flags of the World
Thousands of flags from around the world.

50states.com
Extensive information on all 50 of the United States.

History

American Memory
Historic photograph collections of the United State's history.

USHistory.org
Hundreds of resources about American History

Civil War
Search the Library of Congress's web pages, collections, blogs, etc. 

Civil War Maps
Search for maps by location, subject, or alphabetically.

Gettysburg Address
See a copy of the original Gettysburg Address written by Abraham Lincoln and read about how it was written.

U. S. National Archives and Records
Get primary source documents for American history.

Library of Congress American Memory
American Memory provides free and open access to written and spoken words, sound recordings, still and moving images, prints, maps, and sheet music that document the American experience.

Math

Ask Dr. Math
A question and answer service for K-12 math students and their teachers.

Math Reference Tables
Math tables, algebra formulas, and more.

Graph Paper!
Used your last sheet of graph paper? Don't worry, you can print out different kinds of graph paper here.

Online Conversion
Convert just about anything to anything else.

Texas

Texas.gov
Access official, secure online government services and information for the State of Texas. Take it online, Texas!

Britannica.com
Map, Population, History, & Facts

Handbook of Texas Online
Encyclopedia of Texas history, geography, and culture.

The Portal to Texas History
A gateway to rare, historical, and primary source materials from or about Texas.

Science

NASA
Thousands of pages of resources on astronomy, planets, comets, astronauts, and new discoveries of the National Aeronautics and Space Administration.

Science Made Simple: Measurements and Conversions
Online conversions.

Web Elements
A periodic table of elements with description, and history, uses atomic structure, and additional detailed information for each element.