Tangentially, I thought you might find repair theory interesting, if not useful. Briefly, when students make mistakes while doing arithmetic, these mistakes are rarely the effect of a trembling hand; rather, most such mistakes can be explained via a small set of procedural skills that systematically produce incorrect answers.
Tangentially, I thought you might find repair theory interesting, if not useful. Briefly, when students make mistakes while doing arithmetic, these mistakes are rarely the effect of a trembling hand; rather, most such mistakes can be explained via a small set of procedural skills that systematically produce incorrect answers.