Gabaga Raga 27, arrested last week and charged with unlawful entrance at the school on the night of the fire, is to appear in court today.
He was released on K300 bail last week.
Investigators say Raga remains a suspect even though they could not find evidence that linked him to the burning down of four classrooms last week.
Raga was arrested after witnesses told police he was seen climbing over the school fence hours before the fire started.
Investigators also say they believe the fire may have been started by students and not outsiders.