I snatched this comments from the Jose Vilson blog. It’s related to my last post and his
Check it out. I think it’s pretty insightful.

Re: teaching to tests. In doing so, we give students the permission to forget. By saying you need to know this for the test implies that you don’t need to know it [...]

My students, for the most part, are pretty damn sharp. They pick up on concepts quickly and can generally learn to apply learned concepts in new situations.
However, their one weakness…their only major shortcoming is their mastery of what is considered to be “Standard English.”
The students I and spent the last 5 weeks learning about probability, [...]