Remember how the Every Student Succeeds Act was transferring power from the Feds to the states? Well, not everything. The law still requires annual testing as before. It still requires a participation rate of 95%. The U.S. Department of Education sent a letter to education officials across the nation to advise them about these basic facts.

But what happens when large numbers of students opt out to protest over testing, loss of the arts, and lousy tests?

As Alyson Klein explains in Edweek,

When it comes to opt-outs, ESSA has a complex solution. It maintains a requirement in the previous version of ESEA, the much-maligned No Child Left Behind Act, that all schools test at least 95 percent of their students, both for the whole school, and for traditionally overlooked groups of students (English Language Learners, racial minorities, students in special education, kids in poverty). Under NCLB, though, schools that…