I first became aware that there might be a problem a few years ago, when one of my kids was studying weather systems: high- and low-pressure systems, cold fronts and warm fronts. We were trying to help her prepare for a test and also do some sort of homework, and she didn’t get it at all.
We were really frustrated, my husband and I, because all we really had as a reference was the top half of this worksheet that explained the concept. So we were having trouble explaining it to her, and at one point I finally said to her, “You know, in your class, didn’t your teacher ever draw a diagram on the board?”
She said, No.
