Joana Baptista, left, with Oxford Brookes University technology expert Sarah Plant

The Summertown schoolgirl is the brains behind Brush!, an app that tells parents if their children are cleaning their teeth properly. Joana, who lives in Summertown and is a pupil at Oxford High School, said: "I was brushing my teeth one night and began wondering if my parents would know if I didn't do it properly.

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