The qualities of a teacher are the essential factors that influence learners' academic performance. Most of these qualities are acquired through retraining programmes. As a result of this, many in-service training programme have been on-going. This study was undertaken to ascertain the impact of SDGs retraining workshop on pedagogical competencies of primary school teachers. It is a descriptive survey design guided by four research questions. The population of the study consisted of 3,115 primary school teachers who participated in SDGs retraining workshops. Multistage sampling technique was used to select 360 teachers. The researchers developed a structured questionnaire titled primary school teachers' pedagogical competence questionnaire (PSTPCQ, r=0.86). Mean and standard deviation were used to answer the research questions. The results of the data analysis revealed that the SDGs retraining workshops impacted basic science and technology teachers' pedagogical competencies positively in areas of teaching methods, construction of instructional materials and assessment of learning outcomes but negatively on the out-of-class science teaching strategy. It was recommended among others that all primary school teachers should be given opportunity to attend the SDGs retraining workshop and that adequate fund should be made available for regular and consistent retraining programmes to ensure greater and effective instructional delivery of BST lessons.