In this video Paul Andersen describes the new AP Biology Exam. This exam will be given for the first time in May of 2013 and will be different from all previous exams. In this video Paul Andersen describes the scoring and the two parts...

As we forge ahead into the new year, let’s take some time to thank the intrepid researchers, volunteers, and even the occasional dog who came before us, made sure our food and drugs are free from poison, and built the devices that make...

In this video Paul Andersen defines Q10 as the ratio between reactions at different temperatures. He then gives you an example of how it could be calculated. He also includes extensions of other scientific phenomenon that could created...

Today, we're going to talk about the gaming devices that combine the screen, speakers, controls, and computer into one neat little package - that's right we're talking about handheld game consoles. Handhelds have actually been around...

In a lively show, mathemagician Arthur Benjamin races a team of calculators to figure out 3-digit squares, solves another massive mental equation and guesses a few birthdays. How does he do it? He’ll tell you.

We don't think of pocket calculators as being all that special these days, but in reality their rise coincided with many of the innovations we take for granted today.

What are logarithms and why are they useful? Get the basics on these critical mathematical functions -- and discover why smart use of logarithms can determine whether your eyes turn red at the swimming pool this summer. Lesson by Steve...

The history of computers began with primitive designs in the early 19th century and went on to change the world during the 20th century.

Familiarize yourself with essential system utilities like date, uptime, and hostname, enhancing your system management capabilities.

Howcast - If you're looking to add some muscle to that skinny frame, this guide will help you skip some of the eating errors your fellow gym rats have undoubtedly made.

Howcast - The Pythagorean theorem is a cornerstone of geometry. Here's how to use it.

Howcast - Doing well on the SAT can mean the difference between attending your first choice and your safety school, so you'd better learn what to do.

Howcast - The geometric mean of two numbers is the square root of their product. More generally, it is the “nth” root of the product of n numbers.

Howcast - A trapezoid is a four-sided figure with one pair of parallel sides. Because a trapezoid can be dissected into a rectangle and two identical triangles, find it’s area is easy.

Howcast - Your ruler shouldn't be used only to draw a straight line. Make sense of all those little lines and take advantage of its intended use.

Howcast - Going from a pocket calculator to a graphing calculator can be as daunting as going from a skateboard to a car. Make the jump and learn the basics of using a graphing calculator.

Howcast -The price on the tag is probably not the price you will end up paying. Follow these steps to determine how much your new purchase will really cost.

Howcast -Learn how to use the built-in scientific calculator on an iPhone in this Howcast video.

Want to win the prize? Knowing a little math is the key to winning this popular contest.

Subtract, divide, and multiply your way to successfully determining how much that increase or decrease really amounts to.

Pupil outcome: I can explain how one hundred thousand can be composed Key learning points: - Ten ten thousands make one hundred thousand. - One hundred one thousands make one hundred thousand. - One thousand one hundreds make one hundred...

Pupil outcome: I can use the formula for the area of a circle to calculate either the area or a missing measurement. Key learning points: - The area of any circle can be found if the radius is known. - The radius can be calculated from...

In this video, we solve three questions (in order of ascending difficulty) where we solve exponential equations by using logarithms.

In this video, we define radians and learn how to convert between radians and degees.