Nevada’s initiative for converting public schools into charter schools may be coming to an end.

State Sen. Marilyn Dondero Loop on Monday introduced SB 321, a bill to abolish the Achievement School District, which allows low-performing public district schools to be converted into charter schools overseen directly by the Department of Education. The Achievement School District was created by the Republican-controlled 2015 Legislature.

According to the district’s website, there are four schools currently within the Achievement School District: Democracy Prep at the Agassi Campus, Futuro Academy, Nevada Preparatory Charter School, and Nevada Rise Academy. Eight additional schools — all in Southern Nevada — were flagged for potential conversion by the state board late last year.

SB 321 would give the existing achievement schools until July 1, 2020 to secure sponsorship under another authorizer body. That could mean a public school district, university or the State Public Charter School Authority. If an alternate sponsor is not found, the school would be forced to close.