This study was carried out to examine the present curriculum of Economics as a subject in some Ogbomoso Senior High Schools and to determine factors affecting effective teaching of economics in the schools. Variables such as number of students, teachers' ratio available textbooks were also examined. The study adopted descriptive design since it is an ex post facto research. The target population for this study is Ogbomosho North Local Government Area of Oyo State comprising nine (9) High Secondary Schools. Three (3) teachers of economics and five (5) students from each school were used in answering the questionnaires. The study revealed high number of economics students (5,864) as against 26 teachers in nine (9) public schools under study. This gives a very high teacher-student ratio of 1:225. The findings also showed that there one lack of teaching aids, library facilities and where available, there is lack of textbooks of Economics. All the schools studied were highly dense resulted into high students' population. Based on the findings of his study, the federal and the state governments should employ more teachers, especially in Economics to checkmate rising teacher student ratio. More senior secondary schools should be built with the increasing student population within the LGA under study.