Learn the basics of the molecular structure of RNA in this video. Video discusses structure as well as compares the structure of RNA vs. DNA. [11:29]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

If you want an interactive way to practice karyotyping, this is it. There are three patient histories and karyotypes to use in diagnosing human genetic disorders. There is enough information on comparing chromosomes to get you started.

Learn the basics of prokaryotic and eukaryotic cells in this video. [6:50]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This video investigates how to ask questions and test explanations using the scientific method. [11:48]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Learn the basics of why sweat cools your body down in this video. [5:13]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This video will explore the pH scale. See some examples of how to calculate the pH of water, orange juice, and bleach. [11:37]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This ZOOMSci video segment shows how to create self-contained environments and explore how plants grow under different conditions. [3:24]

How can you tell if harmful bacteria are in your food or water that might make you sick? What you eat or drink can be contaminated with bacteria, viruses, parasites and toxins—pathogens that can be harmful or even fatal. Students learn which contaminants have the greatest health risks and how they enter the food supply. While food supply contaminants can be identified from cultures grown in labs, bioengineers are creating technologies to make the detection of contaminated food quicker, easier and more effective.

Learn about bird banding in Canada. Since 1923, Canada has had a bird banding program which enables it to gather data to help manage and conserve the country's birds. Find out how birds are banded and who is responsible for this. Also, learn what you should do if you find a banded bird yourself. A list of resources completes the discussion.

Have you ever noticed the types of beaks different birds have? The most important fucntion of b ird bill is feeding, and it is shaped according to what a bird eats. The bill is one of the characteristics used to identify birds. You can learn about bird behavious by looking at the bill and thinking about what it easts. Then you may think about where it lives, and so on.

Get the facts about feeding birds. Learn about different types of bird feeders and what to put into them. Next, find out what types of birds come to feeders and some of their characteristics. Finally, familiarize yourself with some of the problems that can arise with bird feeders, as well as learn some tips to combat them. A list of resources completes the discussion.

Students are asked to explain the characteristics of the bird in flight and how adaptations would allow the bird to fly a particular way. [0:32]

The emergence of America as a world power at the end of the 19th century and its acquisition of overseas territories.

Canadian Wildlife site features the North American Bison. Highlights its habitats and habits, feeding and breeding characteristics.

Investigate how skeletal populations can help determine the impact of slavery on the height and health of African American males. This video focuses on the measurements and equations Mark Mack is using to explore relationships between the length of the bones in the leg and height while discussing how statistics is a useful tool to analyze data and make inferences taking math out of the classroom and into real world problem solving.

Describe a bivariate relationship's linearity, strength, and direction. In other words, plotting things that take two variables into consideration and trying to see whether there's a pattern with how they relate.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Canadian Wildlife site features the Black Bear. Highlights its habitats and habits, range, feeding and breeding characteristics.

In this lesson and activity booklet, students learn about The Black Brigade of Cincinnati. The Black Brigade was a military unit of African American soldiers organized in 1862 during the Civil War when the city of Cincinnati, Ohio was in danger of being s

In this video adapted from NASA, two members of a NASA research team working to produce carbon nanotubes share some background behind this new technology, show examples of how it will be useful, and explain the various tests being performed to ensure readiness for spaceflight.