At International School Olomouc, we don't only have division into classes by age, but we also have a system of houses where our students are assigned to groups with other students of different ages across the school. All the house’s names are from Roald Dahl books: Twits, Matilda, Foxes (Fantastic Mr Fox) and the Wonkas (Willy Wonka - Charlie and the Chocolate Factory). These houses come together on Project Days and compete against each other in for instance Maths, Reading and Sports.
This system helps develop students' communication skills as they need to work as a team with younger and older students simultaneously.
The teams then collect points across Project Days and normal school days and one house is announced a winner at the end of the school year and are passed the traditional school trophy in final school assembly.