21-Day Snacking Challenge participating school districts:
| 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 |
| 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 |