Children at Risk also recognized more "high achieving, high poverty" schools with Gold Ribbons this year, in part because that designation included charters and magnets for the first time.
HISD dominated the most-improved schools in Houston, according to this year's Children at Risk rankings. It also has some of the worst schools in the state.
Four elementaries, four middle schools and two K-8 Houston ISD campuses were ranked among the best in Texas, according to newly released ratings from U.S. News & World Report.
New rules introduced last year ban Halloween costumes for secondary students and urge schools to keep celebrations from interrupting instructional time.