People are relocating from across Europe to attend it.
A Sligo school that allows pupils to decide what they want to learn has more than doubled its numbers after the first year.
The Sudbury School in Calry currently educates 32 students aged between 5 and 18 and the Irish Examiner reports that families have moved from England, Scotland and Germany for the new school year.
The school ethos is that students decide what to do with their time, which means they can spend the day climbing trees, reading, researching for a project or surfing their tablets. Whatever they decide to do is purely their own choice.
They also choose when to go into the school and can start any time between 8.30am and 10.30am or leave any time between 2.30pm and 4.30pm.
The paper reports that there is a similar school in County Wicklow while there are plans for others in Dublin, Cork, Galway, Leitrim and East Clare.