Uncertainty is a natural part of life ...and so is science.
Though I'm not a parent, myself, I can understand that parents who care enough to not be complacent about their kids' well being may be concerned at such sense of uncertainty as I would expect one would encounter in being a parent - even without such manufactured uncertainty as and advertisers would typically try to inspire, so in order to sell their products.
I think that a reasonable sense of uncertainty would be natural, however - and it's not as if any parent was in it alone. There is the thing called commuinty. Whether or not in community, we also have this lovely thing called knowledge - It might even be more lovely than speculation.
That we can use science in developing knowledge, then, I think that's important.
To comment to the issues raised in the article: Not to sound like an alarmist, but seriously, I think it raises it a concern for whether we may be approaching a condition of "criticial mass" in inadequate education, in some regions. If the people designing the tests are not even qualified enough to be able to produce valid tests, then what can we expect as results, from the schools? and what can we expect, later, when the students taught in those schools endeavor to set the rules for the next generation of schooling?
I think that the concept of educational reform should be recognized as a concept of national concern. I only hope there are enough people around who are not so touchy about it, though, to be unable to address it.