ALBANY, N.Y. (AP) _ A dozen state senators are urging New York's education commissioner to delay the further rollout of the new Common Core learning standards, citing frustration and complaints by parents, teachers and administrators. They're also threatening to force changes by law if there's no relief.

At a hearing Thursday, Commissioner John King Jr. says some complaints are merging the curriculum itself adopted by 45 states with other issues like teacher evaluations and data collection security.

King says the need for the academic improvement the standards offer is still ``urgent.'' He acknowledged ``uneven'' implementation by the state's 700 school districts and promised adjustments in state guidance.

He says there's little disagreement among experts over the main components of more writing, more challenging reading, and math that has real world applications.