This summer is the biggest year for construction at more than a dozen schools thanks to a bond measure passed by voters in 2010. A host of upgrades and modernizations are occurring at 15 of the school sites, including brand-new libraries at Adams and Washington elementary schools. Overseeing the six construction companies is the L.A.-based firm TELACU. Most of the companies doing the work are based in Santa Barbara, Carpinteria, or Ventura, according to district facilities director David Hetyonk. Much of the work will be finished by the start of school in late August, and the libraries are scheduled to be completed next summer.