Last month, the board authorized Superintendent Dan Chappell to draft a letter to inform parents of the proposed policy change.
Missouri School Boards Association attorneys approved Chappell's letter this month, ensuring the new policy would be legal.
"MSBA is getting a lot of questions on issues like this," Chappell said Monday, Feb. 7.
In January, the district was owed about $5,400 in unpaid breakfast and lunch fees.
"We don't want students to not eat, but we have to do something," Chappell told the board in January.
Chappell said students who owe more than the $25 limit will not be immediately barred from participating in extracurricular activities or events. Instead, parents will be given 10 days to get their accounts below the limit.
In other business
* Chappell will update the board on an upcoming school lighting project. Old lights and fixtures are set to begin being replaced next week.
* The board will hear that the district received state approval to use leftover government stimulus funds to replace windows in the special education classrooms. A drop-ceiling also will be added, among other improvements.
* The board will consider renewing the principals' contracts and will set the date for graduation.
The Thayer R-2 School Board will meet at 7 p.m. Thursday, Feb. 10, in the high school library.