Caitlin Hunt's school say she was a "popular" and "vibrant" student. The nine-year old was knocked down by a Thamesdown bus at Blair Parade in the Moredon area of the town shortly before six o'clock on Tuesday afternoon.
She was hit at the junction of Moredon Road and Churchwalk outside a parade of shops.
Caitlin, who was in Year 4 at Rodbourne Cheney Primary School, was treated at the scene, but died of her injuries.
Caitlin was a vibrant and passionate learner at Rodbourne Cheney Primary School and her lack of presence in the future will be noticeable. "She was a popular girl, loved by teachers, the pupils, but especially by her classmates. It is hard to imagine the terrible sense of loss and tragedy which is being felt by Caitlin's family at this time and our deepest sympathies are with them.
We are fully cooperating with current police investigations however our thoughts are with the family at this difficult time. We are also supporting our driver and the team who have been affected by this accident."