The implementation of national Biology curriculum depends on the superiority and aptness of the teacher’s transactional skills; which are a replication of his/her qualification and experience. In view of this, the study examined teacher’s characteristics and implementation of national curriculum for secondary school Biology in Southwest, Nigeria. The study specifically examined the availability of qualified and level of experience of Biology teachers in implementing the curriculum. The descriptive research design of the survey type was used in this study. The population of the study comprised all Biology teachers in all the public secondary schools in Lagos, Ogun, Oyo, Osun, Ondo and Ekiti. The samples for the study consisted of 180 biology teachers drawn from 90 public secondary schools in Southwest, Nigeria. The sample was selected using multistage sampling procedure. An Inventory on Teachers’ Characteristics (ITC) was used to collect data for the study. The validity methods used were face and content validity. The responses obtained were collated and analysed using descriptive statistics. The findings of the study revealed that less than half of the Biology teachers were qualified to teach Biology at the senior secondary school level but most of the teachers teaching Biology were experienced in the teaching of Biology at the senior secondary school level. It was recommended that school administrators should ensure that only qualified teachers are recruited to teach Biology in senior secondary schools.

Keywords: Teacher’s Characteristics, Implementation, National Curriculum, Biology,

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