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The Great Courses® - Audio & Video Lectures from The World’s Best Professors. Secrets of Mental Math. Quick: What's 25 × 45?

Secrets of Mental Math

How about 742 × 300? Or 4821 ÷ 9? Most of us, when faced with math problems like these, immediately reach for a calculator or a pen. But imagine if you could perform these and other seemingly difficult—but surprisingly easy—calculations right in your head. Seems like an impossible feat? One key to improving and expanding your math potential—whether you're a corporate executive or a high-school student—lies in the powerful ability to perform mental math calculations. View More giving you a competitive edge in school or at work;keeping your mind active and sharp at any age;improving your performance on standardized tests; andlearning to solve problems by using a variety of methods. Mental mathematics also is valuable when you're shopping for groceries or figuring out how much to tip at a restaurant. Mental Math—Made Simple Mental math, as Professor Benjamin demonstrates, is not as daunting as it may seem.

Dr. Discover Valuable Mathematical Tips and Techniques View Less. Your Field Guide To The Internet. Free Online Course Materials. Chesscademy - A Fun and Easy Way to Learn Chess! Free university lectures - computer science, mathematics, physics, chemistry.

Whether your goal is to earn a promotion, graduate at the top of your class, or just accelerate your life, lectures can help get you there.

free university lectures - computer science, mathematics, physics, chemistry

Our archives of lectures cover a huge range of topics and have all been handpicked and carefully designed by experienced instructors throughout the world who are dedicated to helping you take the next step toward meeting your career goals. Lifelong learns can turn their free time turn into self-improvement time. The online lectures on this list are more than lecture notes or a slideshow on a topic -- they were designed for audiences like you, with carefully sequenced themes and topics taught by veteran educators, and often with additional resources for your own independent study. The lectures are available to anybody, completely free of charge. Lecture courses are a valid and vital learning tool, and may be one of the best methods of learning available. Aesthetics and the Philosophy of Art. The Saylor Foundation. Smarthistory: a multimedia web-book about art and art history.

Smarthistory offers more than 1500 videos and essays on art from around the world and across time. We are working with more than 200 art historians and some of the world's most important museums to make the best art history resource anywhere. Use the "subject" pulldown menu (go to "Arts and Humanities") at the top of this window or click on the headings below to access our content: Art history basics First things first (you are here) The materials and techniques artists use Art 1010 Prehistoric art in Europe and West Asia. Coursera.

Online Classes - The Best Online Classes In Your Career Field. OpenLearn - The Open University. Khan Academy. Introduction to Algorithms - Download free content from MIT. Advance Your Education With Free College Courses Online - Udacity. 12 great free online courses. Much ado has been made in recent years over the quickly rising cost of healthcare in the United States.

12 great free online courses

But the cost of college tuition and fees has skyrocketed at nearly twice that rate. Going to college today will cost a student 559% more than it did in 1985, on average. In an exciting talk given at TEDGlobal 2012, Stanford professor Daphne Koller explains why she was inspired — alongside fellow professor Andrew Ng — to create Coursera, which brings great classes from top universities online for free. Coursera classes have specific start dates, require students to take quizzes and turn in assignments, as well as allowing professors to customize their course into online chunks rather than simply recording their lectures. Even outside of Coursera, the number of college classes available on a computer screen rather than in a brick-and-mortar lecture hall is staggering.

Inspired by Young, below, find 12 courses you could take for a completely free TED degree in Big Ideas. Free Courses – Tuts+ Courses. Reactive programming is a way of coding with asynchronous data streams that makes a lot of problems easier to solve.

Free Courses – Tuts+ Courses

RxJS is a popular library for reactive...Once in a while, it's important for us as developers to go back to what made us excited about computers in the first place. For Derek Jensen, that is gaming....React is a flexible framework that makes it easy to build single-page web applications. One of its tools is a set of lifecycle methods which you can add to...The PixelSquid plugin for Photoshop is an exciting new technology that provides the benefits of 3D elements without having to understand a 3D program or the...How your app looks is as important as how it works, and animation is an important part of modern user interfaces. Whether by changing the color of an element...jQuery UI is an extension of jQuery that makes it easy to create clean user interface elements for your websites. Academic Video Lectures.

Knowmia - Technology for Teaching. Made Simple.