Villagers are to hand in a petition to education chiefs in Powys in protest at plans to close six primary schools in the county.
The council said surplus school places had to be tackled
Children and parents from Howey school will also hold a small demonstration at Powys Council's headquarters in nearby Llandrindod Wells.
Six schools are facing the axe after a council review found that there were more than 4,000 surplus primary places.
A parent in Howey said the 150-year-old school was "worth fighting for".
Tuesday's action is the latest staged by villagers in Powys opposed to the closure of the schools in the county.
Jeff Green, a parent in Howey and chairman of the village school action group, said the school, which has 30 pupils, was a "huge part of the community".
A total of about 25 children and parents will hand in a 1,000-name petition to the council.
"We love this school and it was worth fighting for," he added.
"It's a huge part of the community, but the school fought off closure plans two years ago and before than in the 1980s."
In July, Powys Council said the authority had to provide a service "fit for the 21st Century".
A spokesman said if the council did not tackle the problem of surplus school places "we will be wasting millions of pounds that could be re-invested in education".
The future of the six schools - Howey Church-in-Wales School, Llangurig CP School, Llanfihangel Yng Ngwynga Church-in-Wales School, Ysgol Gynradd Carno, Ysgol Efyrnwy and Ysgol Thomas Stephens - will be decided on 9 October.