The Northside Independent School District Board of Trustees approved a $648 million bond election Tuesday night.

Trustees voted 6 to 0 for the bond which district officials say would primarily be used to upgrade existing schools.

Bond money would also be allocated to build six new schools, renovate cafeterias, libraries, science labs and fine arts facilities. One of the new schools would be a high school.

Previous bond elections have been held every three years since 1995. However, the school district was able to extend the 2010 Bond program to four years.

The bond election will be held on May 10.