They have now shared on social media that they received a thank-you letter from the monarch.
King Charles wrote: "I was most touched to receive your generous message and hope that you, too, had a joyous Christmas. Thank you for your very kind support during what has been a busy year. This card brings you my warmest good wishes for the New Year."
Members of the school community told the media that the students wrote to Buckingham Palace because they are fascinated by British history and culture.
(mk/gs)