"Teachers Teaching Teachers" ("T3") focuses on coaches' roles in the professional development of teachers. Each issue also explores the challenges and rewards that teacher leaders encounter. This issue includes: (1) Weekend Wisdom: Stimulus Funds Boost Professional Learning and Add Saturday Option (Valerie von Frank); (2) Lessons from a Coach: Navigating Cultures Is a Key Skill; (3) Focus on NSDC's Standards: Keep an Eye on Learning Investments (Joellen Killion); and (4) NSDC Tool: Cost Structure for Professional Development. (Individual articles contain references.) [For Volume 5, Number 3 of "Teachers Teaching Teachers," see ED507663.]