While working as a teacher in London, Bushell trained and then qualified as an
educational psychologist, earning a psychology degree from
Bedford College, London, before earning a postgraduate qualification in educational psychology from the Child Guidance Training Centre (the sister school to the
Tavistock Clinic). Bushell was "the first black female psychologist to be admitted to the Child Guidance Training Centre" and graduated in 1965. From 1965 to 1967, she worked as an educational psychologist for Surrey local education authority. In 1967, she began work for the School Psychological Services in
Croydon, where she stayed for the next twenty two years. == Criticism of intelligence tests ==