As theory-based evaluation (TBE) engages in situations where multiple stakeholders help develop complex program theory about dynamic phenomena in politically contested settings, it becomes difficult to develop and use program theory without ambiguity. The purpose of this article is to explore ambiguity as a fruitful perspective that helps TBE face…

The 1994 U.S. History Framework encourages students to learn about ideas and people and to understand how the present world is the result of choices and convictions of people, and the focus of the assessment is to see what diverse U.S. students in grades 4, 8, and 12 understand about U.S. history. The framework proposes that students studying U.S.…