St Mary’s School is an independent day school for girls in Colchester, Essex, England. St Mary's is a member of the Girls' Schools Association and the Independent Association of Preparatory Schools.Motto and HousesThe school's motto, Scientia et Veritas, translates from Latin as Knowledge and Truth.St Mary's pupils are allocated to Houses for which they try to gain house points to win various awards and trophies. The Houses are named after some of the historical gates of Colchester: Abbeygate (green) Balkernegate (blue) Headgate (yellow) Scheregate (red)HistoryThe School use to be a mixed school containing both boys and girls until it was changed to an independent single sex girls school.