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How To: Solve word problems that involve rounding to estimate differences

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to unpack and solve problems that require you to estimate differences by rounding.

How To: Solve SN1 & SN2 reaction problems that involve solvents in organic chemistry

In this free video science lesson from Internet pedagogical superstar Salman Khan, you'll learn how to undertstand the effects of solvents on SN1 and SN2 reactions. Whether you need help studying for that next big test or could just use a hand finishing your homework, you're sure to be well served by this video lesson. For more information, including detailed, step-by-step instructions, take a look.

How To: Make an ice text effect using Photoshop

Photoshop allows users to create all sorts of cool text effects, some of the most popular of which involve creating firey or icey text for titles. This video focuses on the latter, teaching you how to combine several effects in Photoshop to create really cool letters that look like blocks of ice. Give you titles some flair! But don't get flares anywhere near them...

How To: Use the Easy Magic Square trick to prank people into thinking you're a genius

Most bar tricks involve establishing your dominance over your fellow patrons by beating them at pool or hitting on their significant other. Tired of those? Why not try one upping them with math? This video will show you how to pull a great trick / prank called the Easy Magic Square Trick. All you need is a napkin, victims, and a pen. The trick allows you to make a magic square very quickly, and will make you look like a math savant and win free drinks.

How To: Use the Eraser, Scissors and Knife tools in Adobe Illustrator

This is a quick little tutorial that will show you how to use these three versatile tools in Adobe Illustrator. They all involve getting rid of some part of the image you're working with, but each one goes about it in a different way. To get the most out of your Illustrator project, you'll need to be aware of the differences between these tools so you make sure that you always use the right one for the job at hand.

How To: Do a 360 freestyle soccer trick

How do you do a 360 with a soccer ball? Like this of course, by rolling the ball around your body from a chest stall to a neck stall and back again. It looks really cool, doesn't involve hands like a lot of the roll tricks do, and is sure to impress your mates.

How To: Make a paper origami rocket ship

This tutorial will show you how to make a rocket ship using the ancient Japanese art form of origami. It's a rather complicated process for beginners, and it's a good idea to work your way up to this project by first making origami shapes that involve similar folds, such as the crane and the water balloon. But once you've mastered the steps in this tutorial, you'll be able to make a very unusual and distinctive origami design.

How To: Create a camera tripod with a rubber band

There are a lot of ways to keep your camera from shaking. Most of these involve expensive devices known as tripods. If you're super stingy and don't want to spring from a tripod, this video tutorial will show you how to make one using only a rubber band. The method shown in this cinematography video is small, simple, and very effective for keeping your camera from shaking.

How To: Make slime with Borax and glue

Usually our 5-Minute Projects involve soldering and LED lights and other such electronic accoutrements, but this week we decided to skip the fancy stuff in favor of an old-school science project: making rheopectic slime from Borax and glue. This is a pretty safe experiment even for kids--just make sure to do it with parental supervision and keep the Borax, slime, and any fingers that have been touching the aforementioned items out of eyes, noses and mouths.

How To: Find the family tree achievements in Godfather II

In this video, we learn how to find the family tree achievements in Godfather II. All of these involve you manipulating the family tree. For the right hand man, you have to promote one of your soldiers and give them a different ability. The second in command achievements will be done by promoting one of your capos an under boss. Basically, these achievements will be done by you promoting different people and giving them different types of abilities. Once you do this, you will continue to unlo...

How To: Draw illusionistic stairway steps with balls

Perhaps one of the most difficult technical challenges of drawing is creating illusionistic images, mazes, or steps. Like in the movie "Inception," illusionistic spaces involve a dream-like atmosphere and paradoxes in structure, like a neverending staircase. If you're interested in stretching the limits of your mind, go see "Inception." Just kidding. Do go see it, but also check out this drawing tutorial.

How To: Make fun meals with your kids

An easy way to start your children on the path to eating healthy is to involve them in the cooking process. In this tutorial from Modern Mom, get expert tips from Barbara Beery, an elementary teacher with a passion for cooking. Barbara is a cooking instructor for children and runs a kid's cooking school called Batter Up Kids] in Austin, Texas.

How To: Create a formula timer in Microsoft Excel

Are you looking for a way to make your Microsoft Excel formulas simpler, faster and more efficient? If so, you're in the right place. With this free video lesson from everyone's favorite digital spreadsheet guru, YouTube's ExcelsFun, the 2nd installment in his "Excel Formula Efficiency" series, you'll learn how to compare alternative formulas to see which is faster.

How To: Do the windmill pattern dance move in salsa

This video is part of an instructional series on salsa dancing. In this particular video, instructors Anthony Persaud and Julie Merrill indicate the proper way to execute windmill dance moves in salsa. These moves involve structured turning, with or without a partner. The arm is raised up and outward, turning in a clockwise, then counterclockwise motion to facilitate turning from one way to the other. The name windmill refers to the way the arm turns to allow the move. Anthony provides instru...

How To: Use the SUMPRODUCT function in Microsoft Excel

Are you looking for a way to make your Microsoft Excel formulas more efficient? If so, you're in the right place. With this free video lesson from everyone's favorite digital spreadsheet guru, YouTube's ExcelsFun, the very first installment in his "Excel Formula Efficiency" series, you'll learn about the basics of Excel's SUMPRODUCT function — why some people use double negative and why other use times one.

How To: Drink like a man

Getting weird looks from the other dudes at the bar? Maybe because you're ordering a sex on the beach like the other women. Spit out that tropical drink or wine spritzer and throw away your stemware. It's time to put some hair on your chest, hoss.

How To: Pull tricks and pranks on patrons at a pool or billiard hall

The pool hall is one of the most traditional places to meet and socialize with others in both East and West. If your crappy pool skills keep you from enjoying your time out at the pool hall properly, try pulling some of these pranks on people better than you! They range from the extremely simple beat-me-without-scratching gambit and other tricks that defy convenient naming but are hilarious and involve both pool and beer.

How To: Perform the rodeo flip on a surfboard

In this video from Surfline, Jamie O'Brien shows you how to perform an awesome rodeo flip on a surfboard while you are in the ocean. Rodeo flips involve flipping upside down and landing back on your feet. This trick is pretty awesome and you will get some expert advice from this tutorial to get you started.

How To: Solve rate-of-change business math problems in Excel

As you might guess, one of the domains in which Microsoft Excel really excels is business math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, the 30th installment in his "Excel Business Math" series of free video lessons, you'll learn how to solve business math word problems that involve rate of change (increase or decrease).

How To: Do the Toe Bounce freestyle soccer trick

Many of the coolest freestyle soccer tricks involve passing one leg over the ball while it's in the air. This trick, the Toe Bounce or TB, is in that vein, but with a twist. This video will show you how to do the trick, which involves swinging one leg over the ball while the ball bounces off the other foot on the ground before being caught by your swinging foot as it comes back down. Beautiful.

How To: Learn the "Fight Song" for cheerleading

In this tutorial, we learn how to learn the "Fight Song" for cheerleading. Start off by trotting with your right leg first, then clapping for an 8-count. On 1 you will hit a high touch done. On two, you will make a t and on three you will look to the left. On four you will make a high beam, then on five you will step out, and on 6 you will do a high kick. For counts 7 and 8, you will stand ready. The rest of the turns involve spinning for eight counts, then you will yell "go big blue". When y...

How To: Speed up calculations with custom Excel formulas

Are you looking for a way to make your Microsoft Excel formulas simpler, faster and more efficient? If so, you're in the right place. With this free video lesson from everyone's favorite digital spreadsheet guru, YouTube's ExcelsFun, the very first installment in his "Excel Formula Efficiency" series, you'll learn how a custom function (i.e., a user-defined function) can speed up calculations.

How To: Wax a snowboard without an iron

This particular video demonstrates a method to wax your snowboard. This method of waxing the snowboard does not involve use of iron. It is done using a large piece of wax and a piece of cork. Firstly we need to rub the piece of wax over the surface of the snowboard. Hard rub is required and one ball jay is the most efficient. After rubbing for some time we need to polish the waxed using a large round piece of cork. After polishing for some time you will discover a shiny looking snowboard read...

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