For months, state officials downplayed the significance and number of opt outs from state tests last April. The Néw York Times waited a week before acknowledging that it happened.

But now we know that the opt out was historic. 220,000 students–20%–of eligible students refused the tests. The previous year only 60,000 opted out. The number almost quadrupled in only one year. And the momentum will continue to build as state officials refuse to make any changes and threaten sanctions.

Now some say the high proportion of opt outs make state scores and trends invalid.

“That’s a large number, said George Theoharis, a Syracuse University professor and chair of the Teaching and Leadership program at the college. He said caution should be used in using the scores as a measure of students’ performance and schools’ accountability.

“We have to be careful about what we take from these tests and about school accountability, which is built around everyone taking the tests,” he said.

“Last spring, numerous parent groups organized to encourage people to boycott the tests, saying they were poorly written, too difficult, and created anxiety among students. The teachers’ union also joined to encourage opting out.

“The success of these efforts to convince students not to take the exams varied wildly.

“Dolgeville, about 28 miles northeast of Utica, recorded the highest opt out rate in the state, 90 percent, according to a syracuse.com/The Post-Standard analysis of state opt out data released Wednesday. At the other end, about 15 districts spread around the state reported no students opted out.

“Scores of districts, however, had 50 percent or more of their students not take the exams, the analysis showed. Ninety-four districts out of 668 (14 percent) had half or more students opt out of the ELA; it rose to 121 districts (18 percent) skipping the math exam.”

Syracuse.com has test data for every school in the state.

“The region with the highest opt out numbers was Long Island (40 percent) followed by the Mohawk Valley (38 percent) and Western New York (33 percent).

“New York City recorded the lowest opt out number ( 1 percent), the state data showed.

“Central New York had 33 percent of its students opt out.

“In Central New York, the district with the higher percentage of opt-outs was New York Mills with 77 percent opting out of math and 74 percent opting out of the English exam.

“In Onondaga County, LaFayette had the highest percentage of students opting out: 55 percent opted out of the math exam.”

Does a time come when state officials are forced to listen to parents?

It is safe to predict that the staye’s refusal to listen to parents will produce more opt outs next spring.