Charter schools by law do not have selection criteria. The example you mention, the Bronx High School of science, is a public school with an entrance examinatio

Charter schools by law do not have selection criteria. The example you mention, the Bronx High School of science, is a public school with an entrance examination, usually called an "exam school" for short. No charter school anywhere in the country can operate on that basis, as all charter school statutes everywhere explicitly ban examination requirements for entrance.