Product Price Qty   Shape of Change including Shape of Change: Stocks & Flows   $27.00 Add to Cart Thinking in Systems - A Primer by Donnella Meadows   $19.95 Add to Cart ..that School in Tucson DVD and booklet   $39.00 Add to Cart Lecciones en Matematica: Un Enfoque Dinamico por Diana M. Fisher   $99.00 Add to Cart Guns at School: A Systems Thinking Perspective by Barry Richmond   $22.00 Add to Cart Introduction to Systems Thinking with STELLA Guide (Mac) Electronic Version Only   $39.00 Add to Cart Introduction to Systems Thinking with STELLA Guide (Win) Electronic Version Only   $39.00 Add to Cart Diana Fisher Book Set   $158.00 Add to Cart Modeling Dynamic Systems: Lessons for a First Course   $99.00 Add to Cart Lessons in Mathematics: A Dynamic Approach by Diana M. Fisher   $99.00 Add to Cart Software Reference Guide - Tech Doc (STELLA)   $49.00 Add to Cart Introduction to Systems Thinking with STELLA Guide (Mac) Hard Copy and Electronic Version   $39.00 Add to Cart Introduction to Systems Thinking with STELLA Guide (Win) Hard Copy and Electronic Version   $39.00 Add to Cart