Twenty-five outstanding middle grade mathematics teachers were selected to participate in a three-week workshop presented by the Middle Grades Mathematics Project (MGMP) at Michigan State University. A major focus was on the development of leadership; the workshop involved guest speakers, field trips, and an intensive immersion in the MGMP curriculum materials. Following a brief introduction, a list of participants is provided. Eleven lectures are included in the first part of the publication: (1) Maximizing the Surface Area of Children's Comprehension (Masterson); (2) Logo and Middle School Math (Winter); (3) Spotlight on Problem Solving (Lester); (4) Improving General Mathematics (Lanier and Madsen-Nason); (5) Developmental Levels in Geometry (Mitchell); (6) The LES Instructional Model: Launch-Explore-Summarize (Shroyer); (7) Problem Solving in the Transition from Arithmetic to Algebra (Lampert); (8) Research on Similarity and Proportional Reasoning (Friedlander); (9) Motivating Algebra Through Problem Solving (Phillips); (10) "Problems" (Wagner); and (11) A Suggested Outline for a Course in Teaching and Learning Probability and Statistics (Shaughnessy). Part 2 presents Avital's test of 20 historical problems, with solutions developed by the teachers. The third part focuses on an evaluation of the workshop. Finally, miscellaneous information is provided, and appendices contain evaluation forms and data, plus selection procedures. (MNS)