Peterson campaigned strongly against what he called 'over-specialisation' in British pre-university education. In his 1960 report "Arts and Science Sides in the Sixth Form", he vocally described the need for a new kind of educational system, essentially very similar to what the IB Diploma Programme eventually was to become. The new system would provide broader education for students, while maintaining a certain degree of chances for specialisation. He also emphasised the advantages of examinations and of assessing analytical skills in examinations rather than the ability to remember specific facts.