At Cooperstown Junior/Senior High School in New York, in the midst of a divisive community debate among students, faculty and alumni, the school board voted in 2013 to retire its longtime mascot, the Redskins.

At Chowchilla High School and three other high schools in California, the decision on whether to keep using Redskins was taken out of their hands when Gov. Jerry Brown signed the California Racial Mascots Act into law in 2015.

And at Belding High School in Michigan, parents voiced concerns about a student T-shirt they viewed as inappropriate, starting a process that led to a unanimous school board vote a year ago to make Belding the latest school to shed its use of the nickname.

“It was a skull with a headdress on,” Belding Principal Michael Ostrander said of the T-shirt. “Rather offensive.”

At least thirteen U.S. high schools have stopped using Redskins as their mascot since 2013, a 20 percent drop since Capital News Service first reported on the trend of high schools replacing the controversial moniker.

Today, at least 49 high schools in 20 states still use the nickname that some people consider a racist slur against Native Americans, Capital News Service found, down from at least 93 before 1990. A total of 41 high schools have dropped the name, while another three closed or merged with another school that used a different mascot.