Children aged seven to 10 from the indigenous Maori minority group in New Zealand participated in a year-long cultural intervention designed to increase self-esteem and locus of control. The intervention incorporated good teaching practices linked to self-esteem and locus of control with principles of culturally relevant teaching. Compared to matched children who did not participate in the intervention, the focus children had significantly more positive self-esteem and locus of control after the intervention than before. Parallel changes were apparent in a measure of scholastic aptitude, but not on measures of reading, mathematics, and listening achievement. The results are discussed in terms of the importance and effectiveness of using theoretically informed teaching practices in a culturally relevant way in low income, mainstream school settings.