The Houston area is home to many of Texas' top K-12 private schools, according to new Niche rankings, with three Houston schools even breaking into the top 15 schools in the nation. St. John's School, a non-denominational K-12 private school in River Oaks, was again named the fifth best private school in the U.S., the only school in the top five outside of New York. Cooper is now ranked #1 in The Woodlands (Montgomery County), #2 Best Private High School in Texas, and has jumped to #14 Best Private K-12 School in America out of 3,055 schools nationwide," said Jessica Holloway, the school's communications director. NEWS: More Houston-area private schools administer the STAAR test than anywhere else in TexasHouston Quran Academy, an Islamic private day school in Katy, also received a slot among the best private K-12 schools in the state. This article originally published at Three Houston private schools are among the best in the U.S., per new Niche rankings.