On the “repeated addition” problem: ripping the heart out of mathematics and children

It might be useful to tell students that multiplication can be seen as repeated addition under certain circumstances. But docking a student half credit because he/she used commutativity when that was allegedly not permitted--because not specifically taught yet--is fallacious. You can see why if you simply look at a picture of repeated addition for the … Continue reading On the “repeated addition” problem: ripping the heart out of mathematics and children