Explains methods by which a student can check the correctness of his work and so increase his self-confidence. (MM)

Preschoolers were given instruction in the three set relations: (E) equivalence, (G) greater than, and (L) less than. Instructional sequence of the relations was the only independent variable. Posttest scores of the EGL sequence group were significantly better than those of the control groups. (RS)

This study investigated the relationship between conservation of length and impulsive-reflectivity. Kindergarten and first-grade students were administered two conservation of length tasks and an impulsive-reflexive scale. No statistically significant relationship between the two concepts was found. (FL)

Presents techniques and materials for instruction at secondary school and upper elementary grades in mathematical concepts of number systems structure. Grouping is used as a simple algebraic system to illustrate structure. Closure, inverse, identity, commutative and associative properties are examines relative to manipulation of geometric figureS.…

Explains a discovery activity using the possible positions of the faces of a cube when represented in two dimensions. Suggests rules which would determine which of the edges would connect if the drawing were folded to form the cube. (RS)