The study investigates how school teachers' personal background influences their deeper learning capacity and the school effectiveness. Furthermore, the study examines the correlation between teachers' learning capacity and school effectiveness. Four sets of analyses are performed: t tests, one-way ANOVAs, Pearson correlations, and stepwise regression analyses. The research targets a single top-ranking urban junior high school that has the highest admission rates for senior high schools in Taiwan. Data were collected from 192 school teachers, drawn from various grade levels. Results show that (a) personal background does affect teachers' deeper learning capacity and school effectiveness and (b) deeper learning capacity has a strong correlation with school effectiveness.