This academic work begins with a compact presentation of the general background to the study. The presentation provides readers who know little of the topic and of the structure of the educational system as well as of the value given to education in Nigeria with a clear picture. It concentrates on the dynamic interplay of the effect of academic and professional qualification and teachers job performance in Nigeria. The aim of this study is to produce a systematic analysis and rich theoretical and empirical description of teachers and teaching competencies. The theoretical part comprises a...