Recent evidence suggests that early natural number knowledge is a predictor of later rational number conceptual knowledge, even though students' difficulties with rational numbers have also been explained by the overuse of natural number concepts--often referred to as the natural number bias. Hannula and Lehtinen ("Learn Instr"…

Using a cross-cultural perspective, researchers studied the "math avoidance syndrome," which has reached crisis proportions among American Indians, at two elementary schools on Utah's Northern Ute Reservation and Wisconsin's Oneida Indian Reservation in 1980. Researchers gathered data by observing math instruction at the schools and by…