In 1970, the educational institute was renamed to the Anderson High School when they made a move to comprehensive education and at this time, there were over 350 pupils in the school. The school building was extended and there was a new school block in the back of the institute, a new gym hall and an assembly hall. In 1977, another gym hall and three large building blocks were added and so was a science block in 1993 and in 2005, a special needs department was built. The original institute building was the school's English department and it contained a school library on the ground floor.
