Referencing a principle from author G.K. Chesterton (to not reform a policy unless you know its original purpose), Wiliam argues that before we make changes to long-established grading practices, we must know the reasons those practices are favored by many teachers, and what benefits the practice may have. He explores why three grading…

In this "Open Dialogue: Peer Response," the author notes that in the initial paper, "Contributions of Educational Psychology to Understanding Student Learning: What Has Been Discovered - What More Could Be Done?" Entwistle lays out a useful summary of the way that psychology has contributed to an understanding of student…

With teacher and leader workloads and burnout at an all-time high, it's time for de-implementation: de-prioritizing and deleting the less effective, higher-cost initiatives we implement in schools. De-implementation allows us to focus on practices that have more supporting evidence and a higher probability of positive impact on students, and at…

In this article, Dylan William states that the central claim in Baird, et al.'s piece is that if theories of assessment take into account theories of learning, assessments will somehow be more valid, and some of the more egregious effects of assessment on learning will be ameliorated. William responds to this claim by arguing that it seems…

"The only important thing about feedback is what students do with it," declares Dylan Wiliam in this article. The standard school procedure (in which a teacher looks at a piece of student work and writes something on it, and the student later looks at what the teacher has written) does not necessarily increase student learning. Teachers…

Since our 1998 review of research on classroom assessment and learning was published, we have contributed to theorising formative assessment, but recognise that this work is incomplete. In this paper, we take up a suggestion by Perrenoud that any theory of formative assessment must be embedded within a wider theoretical field, specifically, within…

According to author Dylan Wiliam, because lessons never go exactly as planned, teachers should build plan B into plan A. This involves designing a lesson with a "hinge" somewhere in the middle and using specific kinds of questions--what he calls hinge questions--to quickly assess students' understanding of a concept before moving on.…

According to Dylan Wiliam, the traditional classroom practice in which a teacher asks a question, students raise their hands, and the teacher calls on a volunteer does not actually provide much useful information--and it may even impede learning. When teachers ask questions in this way, they're only engaging the most confident students in the…

In "How Is Testing Supposed to Improve Schooling?" Edward Haertel has proposed a framework for thinking about the mechanisms by which testing might improve the various educational processes undertaken in schools. The framework seems to the author to be quite general (he uses the word "general" here in its mathematical sense of including all cases)…

Just as a thermostat adjusts room temperature, effective feedback helps maintain a supportive environment for learning. Because of the many factors affecting how recipients respond to feedback, research offers no simple prescription for making feedback work effectively. What works in one classroom for one teacher will not work for another teacher.…

The idea that assessment is intrinsic to effective instruction is traced from early experiments in the individualization of learning through the work of Benjamin Bloom to reviews of the impact of feedback on learners in classrooms. While many of these reviews detailed the adverse impact of assessment on learning, they also indicated that under…

The idea that validity should be considered a property of inferences, rather than of assessments, has developed slowly over the past century. In early writings about the validity of educational assessments, validity was defined as a property of an assessment. The most common definition was that an assessment was valid to the extent that it…

This article explores the use of standardized tests to hold schools accountable. The history of testing for accountability is reviewed, and it is shown that currently between-school differences account for less than 10% of the variance in student scores, in part because the progress of individuals is small compared to the spread of achievement…

The accuracy of the results of the national tests in English, mathematics and science taken by 11-year olds in England has been a matter of much debate since their introduction in 1994, with estimates of the proportion of students incorrectly classified varying from 10 to 30%. Using live data from the 2009 and 2010 administration of the national…

This September 2010 article is a reprint of the original October 1998 article. Few reform initiatives focus on what goes on in the "black box" of the classroom, on what really happens in the interaction between teachers and students. This article is about the inside of the black box. The authors focus on one aspect of teaching: formative…