21-Day Snacking Challenge participating school districts:

Fall
School District Registration Registration Dates
Richardson

Open

9/8/25 - 9/15/25
Frisco

Open

9/15/25 - 9/22/25
Rockwall

Open

9/15/25 - 9/22/25
Lewisville Closed 9/23/25 - 9/30/25
Allen Closed 9/24/25 - 9/30/25
Northwest Closed 9/24/25 - 10/1/25
Community Closed 9/29/25 - 10/6/25
Weatherford Closed 9/29/25 - 10/6/25
Irving Closed 10/6/25 - 10/13/25
Arlington Closed 10/6/25 - 10/13/25
Plano Closed 10/21/25 - 10/28/25

Winter/Spring
School District Registration Registration Dates
Sanger  Closed 1/12/26 - 1/19/26
Prosper Closed 1/19/26 - 1/26/26
Dallas Closed 1/20/26 - 1/27/26