With a view to meeting the subject-specialist teacher shortage in national and provincial schools, 4,286 diploma holders of Colleges of Education, were recruited to the teacher service yesterday at a ceremony held under the patronage of Prime Minister at Temple Trees yesterday.Addressing the new teachers, Prime Minister Ranil Wickremesinghe said that the National Colleges of Education were established according to his concept since he believed that only trained teachers should be in the school system. The government has been allocating much funds for the upgrade of teaching expertise in the school system as the future of the country defends on the quality of education. He said that a few more National Colleges of Education should be established to train science teachers.