The vehicle is carrying four payloads for commercial companies plus the Irvine CubeSat built by high school students in Irvine, California.
The Irvine CubeSat Program is a revolutionary STEM initiative based in Irvine, California. With over 100 members from six public high schools, the program collectively strives to assemble, test, and launch a solar powered CubeSat. It aims to inspire the next generation of innovative thinkers, creators, programmers, and explorers.
Here is a video about the program:
We’re launching the incredibly exciting @irvinecubesat satellite on #ItsBusinessTime, built by high school students in Irvine, California. It’s such a privilege to open access to orbit for projects like this. @IPSFinfo #CubeSats #TimeToFly pic.twitter.com/SAqyEJQxr0
— Rocket Lab (@RocketLab) June 22, 2018
The company’s press kit (pdf) has lots of information about the mission. See also Rocket Lab set for first operational Electron launch with five payload elements – NASASpaceFlight.com.