I wouldn't disagree - I know that there are Mathematical topics that I did by rote when I was at school that I now understand, and I'm not sure how I developed that understanding, because I haven't really thought about them for 20 years. I'm surprised how many KS4 students that I meet that clearly don't understand even arithmetic. I think that issue is more interesting with ICT, though, because not thinking about how something works can actually turn it into something else. For example, if you create a web-page without any thought to the structure of HTML, aren't you really just word processing? In which case, you might as well save yourself the time and expense of buying WebPlus. Similarly, if you don't understand how your animated web-page works, you could have just stuck with PowerPoint.