A controversial proposal to end a tax break that benefits fewer than 18,000 Oklahomans – the vast majority of whom make upwards of $200,000 – is at the center of the debate over how lawmakers can find more money for education and potentially end the teacher walkout.

Teachers, education advocates and House Democrats have launched a renewed push since the teacher work stoppage began on Monday for the Legislature to pass a bill that would eliminate the state’s capital gains deduction.

The deduction allows property, such as stock or ownership interest in Oklahoma-based businesses, to be deducted f...