As a Math coach at my high school one of my jobs is to coordinate all district and site common assessments for my school.
I spent two days in the library calling in all of the students who were absent on district test day or needed more time to finish. Of course, more information about our students is very useful, but I feel the teachers' frustrations that between district, state, and site common tests, they have lost even more instruction time than ever.
I calculated the time I have spent proctoring standardized tests since my teaching career began 8 years ago and I came up with nearly 4-5 weeks of my career has been spent monitoring students as they take tests. When scores or performance is low, administrators think - okay, let's get more information about our students.
Maybe we should be spending more time training and using informal assessments to improve instruction. I think the scales are already tipped too far toward formal assessments.