Public school finance and school accountability are highly contentious subjects. This correlational study illustrates campus level instructional spending efficiency by examining various input and output variables. The study utilizes data envelopment analysis of selected variables to compare elementary campuses and create instructional spending efficiency measures within purposively selected metropolitan educational service regions in Texas. The study analyzes elementary school instructional spending and student classification as economically disadvantaged compared to student achievement in English language arts. The study finds a direct relationship between instructional spending efficiency and student achievement. The relationship between the socioeconomic variable of economically disadvantaged status is inverse. This finding suggests that in depth examinations of highly inefficient, but relatively high academic performing cases, may uncover effective instructional or operational practices tailored to the needs of the sub-populations.