Twenty-seven supplemental lessons for primary students involving mathematical thought problems on addition, subtraction, and comparison (e.g., greater than and less than) are presented. Each of the lessons contains 10 or more problems which students either hear or read and then respond to either orally or on written answer sheets. The materials in this booklet are grouped in four sections: (1) 27 word problem cards (one for each lesson); (2) student answer sheets for those lessons requiring written answers; (3) transparency masters for presenting the questions for several of the lessons; and (4) instructions and materials for three games which can be used with some of the lessons. This document is part of a collection of materials from the Iowa Area Education Agency 7 Teacher Center project. (DC)