http://www.washingtonpost.com/blogs/answer-sheet/wp/2013/06/18/the-common-cores-fundamental-trouble/
"Nor are we exaggerating the potential for disaster. Consider this description from Charlotte Danielson, a highly regarded mainstream authority on teacher evaluation and a strong supporter of the Common Core:
I do worry somewhat about the assessmentsIm concerned that we may be headed for a train wreck there. The test items Ive seen that have been released so far are extremely challenging. If I had to take a test that was entirely comprised of items like that, Im not sure that I would pass itand Ive got a bunch of degrees. So I do worry that in some schools well have 80 percent or some large number of students failing. Thats what I mean by train wreck.
Reports from the first wave of Common Core testing are already confirming these fears. This spring students, parents, and teachers in New York schools responded to administration of new Common Core tests developed by Pearson Inc. with a general outcry against their length, difficulty, and inappropriate content. Pearson included corporate logos and promotional material in reading passages. Students reported feeling overstressed and underpreparedmeeting the tests with shock, anger, tears, and anxiety. Administrators requested guidelines for handling tests students had vomited on. Teachers and principals complained about the disruptive nature of the testing process and many parents encouraged their children to opt out."