This study examined the relative impact of structured peer tutoring and group reward components of the reciprocal peer-tutoring intervention on the mathematics performance of elementary school students at high risk for academic failure. Sixty-four students were selected randomly from a pool of 80 4th-and 5th-grade students. Students were assigned randomly to four conditions: structure plus reward; reward only; structure only; and no structure, no reward. Findings indicated that students who received both components showed the highest levels of accurate mathematics computations. Analyses of collateral measures revealed that students in the group-reward conditions received higher classroom conduct reports than students in the nonreward conditions. Students in the structured conditions reported higher levels of scholastic competency and self-control than did students in the nonstructured conditions. Data were reported on treatment integrity and teacher and student satisfaction.

micronutrient deficiency in an individual from a vulnerable population group should trigger consideration of other subclinical micronutrient deficiencies that may be less apparent.