Twenty years after the first charter school opened in St. Paul, MN, the sector continues to grow. Over 500 new public charter schools opened their doors for the 2012-13 school year. Compared with the 2011-12 school year, an estimated additional 275,000 students are attending public charter schools in the 2012-13 school year. With the addition of new charter schools and students, there are now approximately 6,000 public charter schools enrolling over 2.3 million students across the country. These increases continue five years of significant growth for public charter schools. Since 2007-08, the public charter sector has added 1,700 schools almost a 50 percent increase and is serving an additional 1 million students, an increase of 80 percent.