« previous next »
« previous next »
 

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Slow-Wave Sleep and Learning Slow-Wave Sleep and Learning
The process of learning to read involves physical and socioemotional development, changes in the ... The process of learning to read involves physical and socioemotional development, changes in the ...
Researchers have found that science instruction can be quite effective in grades 4 to 7. Researchers have found that science instruction can be quite effective in grades 4 to 7.
Under what conditions can the transition to middle school be associated with declines in grades and ... Under what conditions can the transition to middle school be associated with declines in grades and ...
An example of a cover letter sent in response to a classified ad. An example of a cover letter sent in response to a classified ad.
Analogy showing the effects of substitution, deletion, and insertion of one letter in a sentence Analogy showing the effects of substitution, deletion, and insertion of one letter in a sentence
Video: Egg and Sperm Formations in Animals Animation

For a complete list of videos, visit our video library