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Ten Most Extreme Substances Known to Man

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Types of Mathematical Averages and Their Formulas In mathematics, the average of two or more numbers is called the mean. The most commonly used mean is called the arithmetic mean, in which you add up all the values and divide by the number of values. For example, the arithmetic mean of 2, 5, and 14 is (2+5+14)/3 = 7. However, there is more than one kind of mean, including the geomtric mean, harmonic mean, root mean square, and several others. The essential property of any mean is that it must fall between the highest value and the lowest value. Age of Distraction: Why It’s Crucial for Students to Learn to Focus Digital classroom tools like computers, tablets and smartphones offer exciting opportunities to deepen learning through creativity, collaboration and connection, but those very devices can also be distracting to students. Similarly, parents complain that when students are required to complete homework assignments online, it’s a challenge for students to remain on task. The ubiquity of digital technology in all realms of life isn’t going away, but if students don’t learn how to concentrate and shut out distractions, research shows they’ll have a much harder time succeeding in almost every area. “The real message is because attention is under siege more than it has ever been in human history, we have more distractions than ever before, we have to be more focused on cultivating the skills of attention,” said Daniel Goleman, a psychologist and author of Focus: The Hidden Driver of Excellence and other books about social and emotional learning on KQED’s Forum program.

50 Amazingly Helpful Time-Tested Tips for the Kitchen You know all of those helpful kitchen-related suggestions that old-timers are so willing to share with the younger generations? These little tips and tricks might be called “kitchen hacks” these days, but they’re still the same good old nuggets of wisdom that they always were. As with any old wives’ tale, hack, or tip, your mileage may vary. Some of these gems have been around for several lifetimes - and according to most grandmas, they really work. 1. For cleaning smelly hands after chopping onions or garlic, just rub them on a stainless steel spoon.

Useful tips to make life easier (22 picks) Why didn’t I think of that? You’ll be uttering those words more than once at these ingenious little tips, tricks and ideas that solve everyday problems... some you never knew you had! Hull strawberries easily using a straw. Rubbing a walnut over scratches in your furniture will disguise dings and scrapes. TakePart - News, Culture, Videos and Photos That Make the World Better Breathe easy, tokers. Smoking marijuana in moderate amounts may not be so bad for your lungs, after all. A new study, published in this month's Journal of the American Medical Association, tested the lung function of over 5,000 young adults between 18 and 30 to determine marijuana's effect on lungs. After 20 years of testing, researchers found some buzzworthy results: regular marijuana smokers (defined by up to a joint a day for seven years) had no discernable impairment in lung activity from non-smokers. In fact, researchers were surprised to find marijuana smokers performed slightly better than both smokers and non-smokers on the lung performance test.

Populations and Samples The study of statistics revolves around the study of data sets. This lesson describes two important types of data sets - populations and samples. Along the way, we introduce simple random sampling, the main method used in this tutorial to select samples. Population vs Sample 6 Things the Most Productive People Do Every Day Ever feel like you’re just not getting enough done? Know how many days per week you’re actually productive? About 3: People work an average of 45 hours a week; they consider about 17 of those hours to be unproductive (U.S.: 45 hours a week; 16 hours are considered unproductive). We could all be accomplishing a lot more — but then again, none of us wants to be a workaholic either. It’d be great to get tons done and have work/life balance.

950+ Photoshop Tutorials To Keep Your Skillset Updated I know how much everyone loves tutorials, I know I love writing them too. Well in this post I have taken my time to roundup some Photoshop Tutorials and some Photoshop Roundups that I think is valid to be featured in this post. I know quite a few people are going to love me for this, but let’s keep it professional. If you think that I was kidding about the title, well then you’re making a mistake, there is really 1000 tutorials in this post. I hope you guys enjoy the post and the resources.

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