Single-subject experimental designs have long been used in special education to evaluate the effectiveness of interventions for exceptional children. However, the design has not been used widely in gifted education. In this article, an overview of the main features of single-subject design is presented, and its potential for application in gifted education is discussed. The article concludes with a report of a preliminary single-subject study, conducted with a young gifted child, in which the effects of higher order questioning are investigated. (Contains 3 tables and 1 figure.)