On Monday, child care providers and their children rallied outside Daley Plaza for a living wage of $15 per hour. Using a blackboard to illustrate, Cynthia Brown offered a lesson to the children in attendance, showing how much additional income Chicago workers will receive with each planned boost to the minimum wage over the next few years.

“$10 will make a difference–that’s over $3,000 more a year for full-time minimum wage workers. And $13 will make a difference, too,” Brown said, “But the truth is that we need more than that to lift the city’s working families out of poverty–it will take $15. That’s the amount Raise Chicago demanded, that’s what 86% of voters called for in a ballot referendum.”

You can watch video of the action courtesy of Progress Illinois here: