Despite huge investments in the educational sector, many countries in Africa have not fared well in the education indices. This study examined the effect of teaching equipment and teachers' effort on learning outcomes in 744 Nigerian primary schools using Stochastic Frontier and Ordinary Least Square regression. The mean technical efficiency was 0.43 which showed most of the surveyed schools were technically inefficient. Also, 42.8% of public primary schools operate below 20% efficiency level as against 12.3% in private primary schools. Factors influencing efficiency include school ownership type, visits from the Local Government Education Authority Student-Teacher ratio, and school hygiene.