During the 1970s the Department for Children and Parents flourished.
Martha Harris also wanted to see the influence of the Tavistock extended. In the mid-70s, believing that child development information should be more widely available for professionals working with children, she initiated the publication of the hugely successful ‘Understanding Your one/two/three/etc Year Old’ series with Elsie Osborne. She then opened up the pre-clinical seminars to non-medical professions, significantly expanding the teaching that the Clinic provided.