Featured Videos
Algebra
How to Use Prime Factorization on Composite Numbers (Video)
In algebra, composite numbers can be broken into prime numbers by prime factorization. You can solve for prime factors without a calculator or list of primes. This video shows how to use prime factorization to turn composite numbers into prime numbers. [more…]
Algebra
How to Use FOIL to Distribute Two Binomials (Video)
In algebra, variables are placeholder letters (capitalized and lowercase) that represent the unknown, or what you're solving for. This video shows you what variables can look like and what they mean. Understanding variables help make algebra easier for you. [more…]
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Psychology
Hypnotizing Yourself
When you think of hypnosis, two images probably come to mind. The first is from a B-grade movie where you see some Svengali-like doctor — usually deranged — dangling a pocket watch in the face of some [more…]
Russian
Saying Hello and Goodbye in Russian
To greet one person with whom you're on informal ty (tih) terms, use the word Zdravstvuj (zdrah-stvooy; hello). To greet a person with whom you're on formal vy [more…]
Science
Understanding the Transmission of Nerve Impulses
Nerve impulses have a domino effect. Each neuron receives an impulse and must pass it on to the next neuron and make sure the correct impulse continues on its path. Through a chain of chemical events, [more…]
Hebrew Language & Culture
Greeting and Saying Good-bye in Hebrew
Hebrew offers you many choices of ways to say hello and good-bye. Here are a few things to say in greeting: [more…]
Grammar & Usage
Choosing When to Use Who and Whom
The whole topic of pronouns is enough to give you a headache, but the time has come to put to rest one of the peskiest pronoun problems once and for all. [more…]
