United States Dog Agility Association (USDAA)
PO Box 850955
Richardson, TX 75085-0955

Visit their website at: http://www.usdaa.com/

A variety of helpful items are available. A complete list is available by writing to them. Some of the more valuable resources are:
USDAA Official Rules and Regulations
Construction Plans for Dog Agility Obstacles by Kenneth Tatsch
Agility Score Sheets and Score pads
You may also write for information about how your 4-H program can hold a licensed UJHP agility trial.

You may register your dog with them and show in their events. Yes, they register mixed breeds.

Junior Handler Agility Training Manual - by Ruth VanKeuren, Revisions by Bud Houston

http://www.dogwoodagility.com/store/

Minnesota Agility Club

http://www.macagility.org/

(Their address/contact person changes yearly as their officer's change.) 

Please contact the Minnesota 4-H Agility Committee for information about the Minnesota Agility Club.

United Kennel Club (UKC)

100 East Kilgore Road

Kalamazoo, MI  49002

Visit their website at:

http://www.ukcdogs.com/

Note that our 4-H program is not modeled after this style of agility, but it may be of interest to you.

 

American Kennel Club  (AKC)

51 Madison Avenue
New York, NY 10010

Visit their website at:

http://www.akc.org/

4-H agility is not modeled after AKC agility.  There are several similarities and several differences too.  You may be interested in showing AKC style or receiving their information.

 

North American Dog Agility Council  (NADAC)

HCR2 Box 277

St. Manes, ID  83861

Visit their website at:

http://www.nadac.com/

Have requirements for (adult and junior handler) titles similar to regular USDAA.  Note that their Novice Jr. Handler title is most like the Senior USDAA Jr. Handler level.

 

Other Agility resources:

http://www.agilityability.com/

http://www.dogpatch.org/agility/