Interesting article about testing in the New York times, which argues that the effort of retrieving information helps learning. Marcia Linn’s comment is relevant to the Illustrative Mathematics Project:

“More testing isn’t necessarily better,” said Dr. Linn, who said her work with California school districts had found that asking students to explain what they did in a science experiment rather than having them simply conduct the hands-on experiment — a version of retrieval practice testing — was beneficial. “Some tests are just not learning opportunities. We need a different kind of testing than we currently have.”