The article suggests that Belcastro rods, which retain the basic properties of Cuisenaire rods but allow instant identification by touch, may be useful in teaching mathematical concepts to blind children. Drawings illustrate use of the rods in teaching such concepts as addition and subtraction. (Author/DB)

Two cases are reported to illustrate the ways in which standardized tests fail blind children. Other assessment devices are recommended to allow a child to demonstrate how he or she makes sense of the world, such as observational techniques, interviews, structured teaching, exploration, and play. (Author/JDD)

This article discusses issues and difficulties encountered in efforts at the University of Birmingham (England) to standardize a new psychometric assessment tool, a tactile speed-of-information-processing test for children with blindness. The problem of defining the population on which the test is standardized is seen as particularly difficult.…