One parent of a pupil said: "My son really took to him and the way he taught... Absolutely heartbreaking, thoughts and love to his family."
Another posted: "Such a terrible loss. My daughter thought he was a great teacher. My thoughts go out to his family."
The Headteacher of Conyers School, Louise Spellman, said she and members of her staff were "deeply saddened" at the sudden loss of their colleague and friend.
"Paul was a fantastic teacher who thought so much of his students and really gave his all to ensure they achieved their best," added Ms Spellman.
Teacher Paul Hilditch passed away from a COVID-19 infection (Image: Teeside Live/Getty)