Chp. 6 Linear Measurement

I was surprised at how poorly some of the students did on the activities. Especially the students were calling something 5 1/2 when it was only 4 1/2. I guess I understand the confusion, but it doesn't seem to make much sense. As I was reading this article I was reminded of my father-in-law who is always talking about teaching the grand kids "stuff." I think that response to him sometimes is "oh they are to young (1, 2, or under) they couldn't possibly learn something," however as I go through this article some to the issues are just misconceptions. My guess would be that not all of these students have a grandpa who is encouraging them to work with different toys or "equipment." I don't know if this is even making sense.......What I am trying to say is that this article really made me a believer of what my father-in-law does/says. He really is teaching our kids "stuff" that will be useful to them in the future.