But on the topic of test anxiety: I think intentionally causing emotional distress to children for the purposes of making a bad evaluation of their studies is cruel. It's a kind of cycle of trauma - "I did this, so you must to." We use grades to make value judgements of the quality of our children, when what we should be measuring is the ability of our schools to educate them and not how well-educated _the kids are_. The system is backwards, basically, and the fact it causes distress as a side effect is something that _should_ be managed - not ignored.
However anxiety exists and teaching children not to manage it is also bad. One of the really good things I've seen locally is that my school districts (the same that I went through as a child) focus on emotional education at the grade school level much more than when I was a kid, and I notice that the kids have much better emotional regulation than my generation.