was placed on leave from his chief inspector's role for the duration of the war. Many potential pilots and navigators did not have the required education, but a lowering of standards would have been dangerous. Caradus devised and prepared a pre-entry course of educational training which covered elementary navigation, mathematics, elementary science and some service subjects. After a few weeks, however, it was found that men who were nominally up to standard were at a disadvantage on entering their service training in comparison with those who had done the pre-entry course. It was therefore decided that all except those with very high qualifications should take the course. The scheme was a great success and saw a vast increase in the number of graduates. The importance of the aircrew pre-entry education scheme to New Zealand's war effort was acknowledged by the Prime Minister, Peter Fraser. The scheme was adopted by the Royal Australian Air Force and served as a model for similar schemes in Britain and other countries of the then British Empire. Throughout his time in this position Caradus was also a member of the RNZAF Aircrew Selection Committee. By mid-1944 the focus of Caradus' role had changed from initial training to rehabilitation of returning airmen and sailors to the normal workforce. Royal New Zealand Navy personnel had also been brought under Caradus' purview. In the 1946 New Year Honours, Caradus was appointed an Officer of the Military Division of the Order of the British Empire. Later life After the war Caradus resumed his position as chief inspector, secondary schools. At the same time, Caradus continued to act as director of educational services for the RNZAF, when required. He held both positions until his retirement in 1948. He also continued to represent the air force and naval interests on the education committee of the Rehabilitation Board. In November 1946 Rex Mason, Minister of Education, set up a consultative committee to examine the Education Department's technological examinations. There had been problems with these for some time and a fresh approach had become necessary. Caradus was appointed committee chair. The committee consisted of six educationalists and six industry representatives. The committee recommended setting up a National Trades Certification Board. The Government adopted the committee's recommendation and Caradus was appointed first chairman of the board in 1949. In 1947, while attending a science conference in Perth, Australia, Caradus was invited by A.J. Gibson