Nearly $400,000 in security upgrades will be made at an elementary and two middle schools following approval this week by Glendale Unified school board members, one month after they agreed to spend almost $290,000 to make similar improvements at Glendale High School.

The board on Tuesday voted to spend $391,835 to install surveillance cameras at Glenoaks Elementary and Wilson and Rosemont middle schools.

Since March 2014 — after the district contracted with Convergint Technologies — school officials have added surveillance systems at Roosevelt Middle School, Hoover and Clark Magnet high schools, as well as the district headquarters on Jackson Street.

The improvements are part of a $3-million allocation of Measure S bond funds that were earmarked in 2012 for security enhancements.

The Glenoaks project will cost $42,937, while improvements at Wilson Middle School will tally $176,988, and the district will pay $171,910 to complete similar work at Rosemont Middle School.

All three schools will receive cameras and cabling that will be located throughout the campuses, giving administrators in the front office a screen with which they can monitor all indoor and outdoor camera feeds, according to a district report.

When crews finish installing the cameras at these schools, the board is expected to vote on spending more money on similar improvements at the remaining Glendale campuses.