Learn to Coach Tennis on the Cheap

Want to be responsible for the next Rafael Nadal? Why not learn to teach kids how to dominate on the tennis court with today's Groupon?

The group buying site is offering a coupon for 50 percent off of an adult tennis workshop where you can learn how to coach kids from fledgling racket wielders to tennis superstars.

The workshop, held at the Northeast Regional Recreation Center's indoor facility on June 10 from 6-9:30 p.m., would normally cost $20, but with this offer will cost just $10.

The three-and-a-half hour class, led by US Tennis Association trainer Alanna Broderick follows the principles of the national QuickStart Tennis play format, a format sponsored by well-known role models such as Michelle Obama, Andre Agassi, and Steffi Graf.

There are a few catches: you have to buy the coupon by midnight on Tuesday, and it's only valid for this Friday's class. You have to be 18 or older to redeem the coupon and there's a limit of one per customer, although you can buy up to three as gifts.