Earth & Space

Earth from Space
The Smithsonian Institution's online exhibit of Earth seen from a satellite.

NASA Science
The Science Mission Directorate’s web site, with information on their research and missions.

NASA Global Climate Change
Statistics and articles from NASA about our climate. Features videos and a stunning photo gallery.

NASA for Students, 9-12
NASA website just for high school students. Has cool videos, photos, activities, and other resources about space science.
Worldwide, official climate data. Much more than just a weather report!


Physics & Chemistry

Learning Express
Chemistry e-Book and skills improvement practice.
lock-orange  McAllen Public Library card required.

Physics Central
The American Physical Society’s website offers tons of information and fun facts.
Periodic Table of Elements
An interactive Periodic Table of Elements from Los Alamos National Laboratory. Click on an element to learn all about it.


Mayo Clinic – Teen’s Health Center
Locate teen health information, including teen sexuality, teen pregnancy, mental health and other teen health issues.
Medline Plus – Teen Health
Offers links to many health topics.
NIDA for Teens
The National Institute on Drug Abuse (NIDA) created this web site to help teens learn about the science behind drug abuse.
Teen Health and Wellness
Provides students with curricular support and self-help on topics including diseases, drugs, alcohol, nutrition, fitness, mental health, diversity, family life, and more.
National Suicide Prevention Lifeline
The National Suicide Prevention Lifeline is a 24-hour, toll-free suicide prevention service available to anyone in suicidal crisis.


Life Science

Learning Express
Biology e-Book.
lock-orange  McAllen Public Library card required.

Animal Diversity Web
Online database of animal natural history, distribution, classification, and conservation biology.
Genetic Science Learning Center
Information about genetics, bioscience, and health. 


Learning Express
Basic math, algebra, calculus, geometry, trigonometry, statistics.
lock-orange  McAllen Public Library card required.

Khan Academy   
Thousands of educational resources. Topics include math, science, humanities and test preparation. 
apple android 

MIT Online Math Courses
Learn from the best! Take free, online math courses from MIT developed especially for high school students.

Golden Number
Dedicated to providing you with the "phinest" information on The Golden Section, Ratio or Mean, The Divine Proportion, The Fibonacci Series and the golden number, Phi.
Web Math
You'll find over 100 instant-answer, self-help, math solvers, ready to provide you with instant help on your math problem.
Purple Math
Need help with algebra? You've found the right place!

Virtual Math Lab
West Texas A&M tutorials for all levels of Algebra, Math for Science, and taking the THEA and GRE.

Math Vids
Math videos for middle school through college.

General Science

Science in Context
Gale science database for teens.  Articles, videos, and even science experiments!
lock-orange In-library use, or log in with your McAllen library card number.