Changing teaching practices in secondary history classrooms requires teachers to first change their attitudes and views towards teaching history. This was a key finding that emerged from the analysis of changes that took place in the teachers' classrooms during the course of the Teaching American History grant project that was successful in changing teachers' views and attitudes. This article presents a summary of the teachers' practices, ideas, and attitudes about teaching history before participating in the program, the professional development activities that took place with the goal of changing these attitudes and practices, and a summary of the new ideas and practices that were documented after the program. Key curriculum elements in the program that are believed to have produced the most significant changes in attitudes and classroom instruction will be highlighted. The following are appended: (1) Project Data; (2) Sample Lesson Plan - Colonization and Settlement; (3) Sample Lesson Plan - Middle Passage; (4) Sample Lesson Plan - Native American Displacement; and (5) Sample Lesson Plan - Reconstruction. (Contains 11 notes.)