Abstracts of 11 mathematics education research studies are provided. Each abstract is accompanied by the abstractor's analysis of or comments about the study. Studies reported include: "The Importance of Spatial Visualization and Cognitive Development for Geometry Learning in Preservice Elementary Teachers"; "Classroom Ratio of High and Low-Aptitude Students and the Effect on Achievement"; "Replacement and Component Rules in Hierarchically Ordered Mathematics Rule Learning Tasks"; "Intuitive Functional Concepts: A Baseline Study on Intuitions"; "Aspects of Proving: A Clinical Investigation of Process"; "Sex Differences in Teachers' Evaluative Feedback and Students' Expectancies for Success in Mathematics"; "The Position of the Unknown Set and Children's Solution of Verbal Arithmetic Problems"; "Use of Situations in Mathematics Education"; "Strategy Use and Estimation Ability of College Students"; "Story Problem Solving in Elementary School Mathematics: What Differences Do Calculators Make?"; and "Drawn versus Verbal Formats for Mathematical Story Problems." Lists of mathematics education research studies reported in CIJE and RIE from October through December 1982 are also provided. (JN)