Somewhere between gymnastics and martial arts is Parkour, a challenging, physical discipline requiring speed, body control, and flexibility. In this essential lesson for Parkour and freerunning novices, review two essential skills: warm ups and landings. If you want to start practicing Parkour and freerunning safely as a beginner, this lesson is a great place to start.

Parkour is a free-style method of exercise and exploration, in which an individual propels him- or herself through a urban landscape using only their surroundings and their own body—it requires agility and good form in order to prevent injury. In this lesson from Zoic Nation, learn how to do a parkour cat grab. Andy starts by outlining baby steps to get started with, as well as the often-injurious mistakes that people often make, before demonstrating a perfect cat grab.

Both a “punch” and a “plyo” are two-footed jumps in the sport of parkour. But a plyo is not a punch. In this lesson from Zoic Nation, learn how to do a plyometric jump, safely. Andy demonstrates how to step into a plyo (instead of hopping or hurdling into it) for a quiet landing on the balls of your feet, as well as how to swing your arms forward into your jump for momentum. Finally, he illustrates common mistakes that people make and shows what a well-executed plyo should look like.

There’s nothing quite like biting into a vine-ripened organic tomato—no store-bought fruit can compare! Tomatoes are not a high maintenance crop, growing quickly given adequate sun and water. But to ensure high fruit yields as well as a healthy plant, learn about pruning and diseases that affect tomatoes. In this lesson, California organic gardener Trisha teaches you when and how to prune your plant, and how to avoid common problems like cracking or leathery skin, blotchy ripening, and blight.

Confused about why there are electoral votes in US presidential elections? Learn about the Electoral College and the part it plays in choosing the president. In this lesson, HipHughes will explain how electoral votes work, how they are allocated, and why the media pays such close attention to the election map.

Well aware of your cinematic genius, your talented musician friends have asked you to create an artistic and thought provoking visual counterpart to one of their songs. Naturally, you want this music video to demonstrate your unparalleled creativity and skill—so you decide to shoot their music video in one take! This type of production requires plenty of planning and practice, but learn how to do it, and the end result will have everyone marveling at your abilities and wondering how you did it.

Besides masculinity, the beard has long denoted wisdom and a philosophical soul. However, despite the distinguished air a beard can lend to its wearer, a poorly groomed beard may also make the wearer appear slovenly and unkempt. Never fear though—instead, take the guesswork out of your grooming! Learn the most classic and popular styles of beard; Sciascia’s Salon’s Donna Gillis demonstrates how to achieve each beard style (the natural, classic, and urban beards and the Van Dyke).

For archery enthusiasts, knowing how to start and finish a bowstring serving is necessary to maintain your equipment. In this lesson from Wheelie Pete, learn how to do this simple upkeep, beginning by laying the tail end of the string and wrapping the serving, and ending with a technique known as backserving. To get the job done, Wheelie Pete recommends the Arizona Archery Enterprise serving jig. Bonus: this same technique is also good for peep sides!

Learn how scientists discovered DNA and determined its function, composition, and structure. The first in a series of eight, this lesson will teach you about the major experiments that led to our understanding of DNA as the physical basis for heredity. Craig will also teach you about the chemical structure of DNA and recent advances in genetic study - including cloning Dolly the sheep!

Watch the rest of this series to learn about DNA replication, protein synthesis, and gene control.

Curious about the vast world of wine? Start by learning the fundamentals. Sunset Magazine walks you through the basics of processed Vitis vinifera, from choosing the best corkscrews and wine glasses to determining tasting notes. You’ll also learn how to aerate vintages and save a half-empty bottle of wine for another day.

Do you love Korean BBQ? Now you can grill Korean style beef at home following this simple recipe - and you don’t even need a barbecue to make this delicious treat! Learn how to marinade your beef in soy sauce, sesame oil, green onion, red pepper flakes, honey, and garlic. Honeysuckle Catering teaches you how to grill your beef perfectly.

How can we know if what we perceive is real? What's the difference between true belief and knowledge? Socrates tackles these philosophical questions and more in Plato’s cave allegory. This lesson offers an illustrated explanation of the allegory - in which a prisoner is kept facing a wall, seeing only shadow puppets and hearing only echoes. It’s all he has ever known, until he is dragged from the cave and sees the sun. Learn what happens when he returns to explain to his fellow prisoners...

A thesis statement is the first and most important piece of any essay—whether you call it a controlling idea or a unifying concept, your paper must have one. But a thesis doesn’t just state your position on whatever matter you are writing about; it also provides a road map for constructing the body of your essay, an outline for you to follow. In this lesson from David Taylor, learn a simple formula to create a thesis; once you have a solid thesis, your paper will be a delight to write.

Interested in making over your old furniture? Give your chairs new life by reupholstering them with the O'Neil Sisters! Jennifer and Kitty will teach you how to refinish your chair with spray paint, how to choose the right upholstery fabric, and how to recover the cushion to give your outdated or vintage chair an updated look.

Running may seem easy and natural, but it does requires proper technique if you wish to not injure or harm your body along the way. In this fifth and final lesson on improving running form, Oliver Henzler explains how you can avoid overstriding. Some people overstride because of a shortened Achilles tendon; regardless of why you overstride, minimalist running shoes or zero drop shoes naturally help you improve your form. Learn how to run correctly, and your body will thank you later.

Want to improve your running in a way that doesn’t involve grueling exercises? Setting goals is a wonderful way to become a better runner, but Coach Tief is here to tell you that the quality of the goal matters. Often, goals are not attainable or not specific enough. But with Coach Tief’s SMART goals sheet, you will be running better, and increasing your confidence and sense of self worth. Start setting and achieving your goals today (link to SMART goal sheet available)!

Create designer wallpaper without designer prices! This lesson from Cutting Edge Stencils teaches you how to use stencils, paint, tape, and rollers to make easy but original and elegant wallpaper patterns. Learn how to eyeball your stencil placement, layer multiple stencils, and decorate your wall without trouble or mess. This lesson also covers bending stencils around floors and ceilings to get a natural wallpaper look.