Abstract
This study investigated the teachers' pedagogical skills, students' readiness, and achievement in data processing in senior secondary schools in the Ibadan metropolis, Oyo State. The correlational design was adopted in this study to establish the relationship among the variables of concern. We used a multi-stage sampling procedure to select samples. Data was gathered using the pedagogical skills rating scale, the student's readiness questionnaire and the data processing achievement test. Data collected from the respondents were analysed using frequency, percentage, graph, Pearson product-moment correlation, and multiple regression analysis. The study revealed the pattern of teachers' pedagogical skills with regard to communication skills, evaluation skills, adaptability skills, inclusivity skills, and compassion skills, with compassionate skills having the greatest percentage of value. The results further show the composite contributions of teachers' pedagogical skills and students' readiness, having a significant contribution to achievement in data processing. Also, there was no significant relative contribution of teacher pedagogical skills, while there was a significant contribution of student readiness to achievement in data processing. It was recommended that the government should not relent in providing appropriate training and seminars to improve teacher pedagogical skills, while students should work hard to attain positive achievement in data processing.