Striking San Francisco teachers reached a deal with the district Friday, after leaving roughly 50,000 kids without an education for a week and their parents scrambling to figure out how to go to work without child care. Teachers unions once again had put their own interests ahead of the children they’re supposed to serve. School-choice programs can spare families of such hardships in the future. By giving parents the power to vote with their feet, and their dollars, we can curb this cycle of