While right answers are important in math, they are not “given” by the book or by the teacher but may be challenged by the children. Going over some problems in late September the teacher says, “Raise your hand if you do not agree.” A child says, “I don’t agree with sixty-four.” The teacher responds, “OK, there’s a question about sixty-four. [to class] Please check it. Owen, they’re disagreeing with you. Kristen, they’re checking yours.” The teacher emphasized this repeatedly during September and October with statements like “Don’t be afraid to say you disagree. In the last [math] class, somebody disagreed, and they were right. Before you disagree, check yours, and if you still think we’re wrong, then we’ll check it out.” By Thanksgiving, the children did not often speak in terms of right and wrong math problems but of whether they agreed with the answer that had been given.