Investigations in Mathematics Education. Volume 17, Number 1.

This issue contains abstracts and critical comments on 11 articles, plus an editorial comment entitled "A Teacher Shortage?". Studies included concern solution processes on addition and subtraction examples; numerical rule induction; individual differences in performance on manipulative, pictorial, and symbolic tasks; the effect of a calculator curriculum; proportionality rules in judgments of area; van Hiele levels of geometric thought; interaction patterns and attitudes; word problems with ratios; incremental development in algebra; instruction with two types of calculators; and errors in translation from sentence to equation. Research studies reported in "Resources in Education" from July to September 1983 are listed. (MNS)