Seattle ? Governors and education leaders on Wednesday proposed sweeping new school standards that could lead to students across the country using the same math and English textbooks and taking the same tests, replacing a patchwork of state and local systems in an attempt to raise student achievement nationwide.

But states must first adopt the new rigorous standards, and implementing the standards on such a large scale won’t be easy.

Two states — Texas and Alaska — have already refused to join the project, and everyone from state legislatures to the nation’s 10,000 local school boards and 3 million teachers could chime in with their opinions.