There's a war of sorts going on within the normally staid assessment industry, and it's a war over the definition of a type of assessment that many educators understand in only a sketchy fashion. Formative assessments, also known as "classroom assessments," are in some ways easier to define by what they are not. They're not like the long, year-end, state-administered, standardized, No Child Left Behind Act-required exams that testing professionals call "summative." Nor are they like the shorter, middle-of-the-year assessments referred to as "benchmark" or "interim" assessments. Other experts acknowledge that the lack of widespread understanding about the nature of formative assessment makes the term vulnerable to appropriation, but don't necessarily agree that testing companies are deliberately obscuring the distinction.