In Pennsylvania, where I grew up, the numbers are smaller but growing quickly. The PSSA test opt outs tripled in both Math and English language arts between 2014 to 2015. While the movement grew slowly at first, it is picking up speed.
This growing movement will not stop and despite threats from political leaders, with enough support (which we seem to have) educators may finally be able to change the current situation in education to one we (and parents) know will support our students move.