A pig don't get fatter the more you weigh it

No matter how many times you weigh a pig, all you learn is how much it weighs. If you want to learn something else, you need a different assessment. This sensible book demonstrates the power of classroom assessments to improve both teaching and learning. In clear, straightforward language, the authors explain how well-constructed assessments provide data that is essential to the development of learning opportunities for all students, regardless of their backgrounds.