As both the school year and the COVID-19 pandemic progress into another month, there’s no sign that parent anger over the intersection of the two is abating. Groups of parents around the U.S. are filing lawsuits against state and school-district leaders over school mask requirements, with some arguing that such mandates amount to government overreach and others saying that wearing masks all day is harmful to their children.

The spate of lawsuits is the latest development in the long-contentious battle over face masks and COVID-19. Some school district leaders have found themselves confronting their governors over mask requirements, while others are taking on bans on school mask mandates, depending on the state. And now more parents are getting involved.