Skolehuset ble bygd i 1902. Grendeskolene Heia og Holt ble slått i sammen til Foss skolekrets. Bygget ble bygget som en kombinert skole og lærerbolig. Det var to klasserom og to lærerboliger. Den første læreren som bodde her var Ole Willumstad.
Skolen var i drift frem til 1975 og elevene ble da flyttet til Knapstad skole.
Kilde: Hobøl historielag.
Eng:
The school house was built in 1902. Grend School Heia and Holt was turned in together to Foss skolekrets. The building was build as a combined school and teacher housing. There were two classrooms and two teachers' houses. The first teacher who lived here was Ole Willumstad.
The school was in operation until 1975, students were then moved to Knapstad school.
Source: Hobøl historielag.