Technical problems continue for Nevada's Common Core testing a week after a malfunction first halted the federally-mandated assessment process.

Last week, testing was stopped in Nevada, Montana and North Dakota after a widespread system crash with New Hampshire-based Measured Progress.

The company's contracted to administer the tests linked to hotly disputed, federally backed education standards.

Nevada resumed full testing after its first notable success with Friday's limited testing, but system-generated error messages appeared Monday.

Clark County School District said it suspended testing after the system crashed at 9:30 a.m.

All three states have announced plans for school districts that say they can't finish the test.

The U.S. Department of Education maintains there are no exceptions to the mandate to test 95 percent of all students, which is linked to funding.