21-Day Snacking Challenge participating school districts:

Fall
School District Registration Registration Dates
Richardson Closed 9/8/25 - 9/15/25
Frisco Closed 9/15/25 - 9/22/25
Rockwall Closed 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
Leonard Closed 1/12/26 - 1/16/26
Sanger Closed 1/12/26 - 1/19/26
Lubbock ISD Closed 1/19/26 - 1/26/26
Prosper Closed 1/19/26 - 1/26/26
Dallas Closed 1/20/26 - 1/27/26
Coppell Closed 2/23/26 - 3/2/26