COLUMBIA, S.C.  (AP/WVOC) - A years-long effort by state officials to help create South Carolina's next high-stakes tests for public schools may become moot, leaving uncertain how students will be tested next spring.

More than 350 schools were slated to conduct a trial run this spring of the "Smarter Balanced" tests that will determine student proficiency in standards known as Common Core. 

The practice run for 2015 began March 25th in South Carolina and 21 other states that helped develop the tests.

But legislation approved by the House on Thursday would force the state to withdraw from the consortium and ban use of the tests.

The pending legislation prompted the state Department of Education to notify school districts of its intent to withdraw. 

But the state Board of Education refused to support the move.