VIRGINIA BEACH, Va. (WAVY) — Virginia Beach school officials said a threat made against Cox High School stemmed from a post on social media, just the latest in a series of threats against schools not just in Hampton Roads, but across the nation. Hampton City Schools addresses false rumors impacting schools Consider this — just this week, an inappropriate social media post was made at First Colonial High School, and then Tuesday, a Cox High School student reported an inappropriate post on social media that implied a threat to the school. VBCPS Superintendent Dr. Donald Robertson Jr. sent out an email Wednesday afternoon to families, noting that "several of our schools" have received general social media threats in the past 24 hours, calling the messages alarming. Virginia Beach schools superintendent addresses social media threats He noted the division's safety protocols that are in place, including all secondary schools having a school resource officer, armed security officers who previously worked in law enforcement, trained security assistants monitoring buildings, a visitor management system, exterior doors locked, security staff at main entrances and 24/7 surveillance cameras to monitor school grounds. All staff also have crisis management training. "All these messages are being investigated," said Tommy DeMartini, director of Virginia Beach City Public Schools' Office of Security and Emergency Management, "and it takes a lot of time and effort. All the leadership stems from the schools to our leadership. Those investigations consume mass amounts of time that divert attention from the process of education." Said Matt Delaney, VBCPS' chief schools officer: "It's extremely disruptive. Look at our schools today, the social media threats. We are having to send messages out to the community. "We want them, if they see something or hear something, then say something. We have had great success with our students reaching out to a trusted adult. We can be very proactive in our response, and that, typically, is how we get out information."  Delaney said that everyone in the school division is making sure students are as safe as possible, and that they don't take any threat lightly. He also said students must remember the basic principle of being engaged and aware. DeMartini's advice is to not share things on social media with the wrong person. "My message is, do not share these messages with your friends," DeMartini said. "Share them only with an adult, so we can report to the proper parties." DeMartini and Delaney are parents of children who attended Virginia Beach Public Schools.  Their advice to parents during this troubling time of threatening social media posts? Talk to their kids and check their phones. “I learned the hard way," DeMartini said. "We love to trust our students and to check their phones. You are going to be surprised by what you are going to find if you have not checked it." Said Delaney: "We just ask parents to put their own phones down [and] engage in conversation with their kids. The most meaningful time with my children is when we are face to face and engaged in conversation about what is going on in our lives.”  Said DeMartini: "It is OK to check that phone. It is OK to make sure that the phone is being used responsibly. It is your duty for their well-being and everybody else's. It is your duty as a parent to check that phone."