Every time you watch baseball, you’re participating in the latest chapter of a compelling story that goes back hundreds of years. In 24 lectures that paint a portrait of the sport’s remarkable past and take you from the decades before the Civil War to the pivotal year of 1920, Play Ball! The Rise of Baseball as America’s Pastime strikes a perfect balance between sports lore and cultural history.

A.J. and the other second graders do everything except play sports when they go to "fizz ed" class with their new teacher, Miss Small.

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Every week, Gretchen Reynolds single-handedly influences how millions of Americans work out. In her popular New York Times column, she debunks myths, spurs conversation, and stirs controversy by questioning widely held beliefs about exercise.

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Grab a partner for this dynamic workout that features exercises to cover all your major muscle groups, including legs (calf raises), chest (wheelbarrow press), back (double standing arm row), shoulders (double reverse fly), arms (biceps curl), and abs (standing medicine ball toss).

Focus, speed, power: perhaps nothing demonstrates the tae kwon do way as vividly as gearing up and sparring with a partner. In this interactive lesson, Grandmaster Wheaton leads you through a number of kicking drills as well as an introduction to one-step sparring techniques. Bring a partner if you have one, who can also help if you want to break a board.

Focus on tai chi's organizing principles, which underlie everything you have learned so far. These include the balance of yin and yang; softness overcomes hardness; and use mind, not strength. Close with Snake Creeps through the Grass on the other side.

Begin a new qigong series called the Eight Pieces of Brocade. Next, explore the second pillar of tai chi practice: push hands, which involves gentle but challenging sparring with a partner. End with a movement called Single Whip.

Discover how to integrate the outlook and practice of tai chi into your work life. Study a routine that you can do in your office or cubicle, as it requires only one step in each direction. Then, learn Looking for the Needle at the Bottom of the Sea.

Learn the last movement in the qigong series called the Eight Pieces of Brocade. Then go through the entire routine from the beginning, concentrating on how qigong and tai chi promote correct posture and a better back. Close with Snake Creeps through the Grass from the short form routine.

Although it didn't officially emerge until the early 1950s, tae kwon do has already become one of the world's most popular and commercially successful combat sports. Known for lighting fast, head-high kicking style, there is much more to this fascinating martial art. Here, Grandmaster Dave Wheaton teaches the horse stance and introductory kicks.