This study investigated young children's ability to solve probability problems and studied the cognitive processes proposed by Piaget and Inhelder as necessary to solve probability problems. The effects of tutorial and self-discovery training were measured and discussed. Results from 168 first-graders in five training conditions indicated that:…

An adolescent with moderate mental disabilities tutored a seven year old in arithmetic. The peer tutoring program increased the mathematics performance of the first grader, successfully integrated the adolescent into a more typical classroom environment, improved the accuracy of the tutor's mathematics performance, and resulted in changes in…