A bill repealing Common Core is advancing in the Legislature. The Republican-led Senate Education Committee Wednesday unanimously approved the measure. The Alabama Association of School Boards and several chamber of commerce groups opposed the repeal, claiming it result in lower standards. In a joint letter to the senate, the groups said: "Our organizations would encourage you to reject any legislative proposal that harms Alabama's standards or usurps the authority of the Alabama State Board of Education." The bill's sponsor is Senate President Pro-Tem Del Marsh (R-Anniston), who blocked previous repeal efforts. "They've had nine years to show us that this standard works -- it's not," said Marsh, who is soon expected to announce a bid for the U.S. Senate. The bill heads to the full Senate, which could debate the bill Thursday.