A local or regional board of education for a school district with a dropout rate of eight per cent or greater in the previous school year shall establish an on-line credit recovery program. Such program shall allow those students who are identified by certified personnel as in danger of failing to graduate to complete on-line coursework approved by the local or regional board of education for credit toward meeting the high school graduation requirement pursuant to section 10-221a. Each school in the school district shall designate, from among existing staff, an on-line learning coordinator who shall administer and coordinate the on-line credit recovery program pursuant to this section.