Please answer the following question: Altrincham Grammar School for Girls (sometimes referred to as Alty girls or AGGS for short) is an all-girls grammar school with academy status situated on Cavendish Road in Bowdon in Greater Manchester England. Serving about 1250 students age 11 to 18 it is the biggest single-sex grammar school in England. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Educational Institution