This paper reviews the literature on the relationship between birth order and several variables, especially academic achievement. One study found a relationship between leadership skills and birth order for males. Several studies found no relationship between birth order and academic achievement; grade point average; self-esteem; locus of control scores; and scores on the Developmental Indicators for the Assessment of Learning-Revised test. Some of the studies did find relationships between academic achievement and variables other than birth order, such as parents' educational level. Two studies determined that first-born children received more parental interaction and more affectionate and caretaking behaviors from their mothers than did other children. Other studies indicated that first-born children: (1) had higher academic achievement after a relocation; (2) had higher grade point averages; (3) made up a larger proportion of the college population; and (4) scored higher on standardized tests of verbal aptitude. It is concluded that there is a relationship between birth order and academic achievement. Spacing children's ages can offset the advantage of the first-born. Parental interaction with a child and the parents' educational background influence the child's academic achievement. An 18-item bibliography is provided. (BC)