Clark County School District, the nation’s fifth largest school district covering Las Vegas and surrounding areas, announced a “vendor data security incident” last night. The data breach involved a vendor called Pearson Clinical Assessment. CCSD provided no details about how the incident happened, but claimed that it affected over 500,000 students by exposing their names and some birthdates. Mashable reports that Pearson PLC learned of the breach in March and believes the breach to have affected 13,000 schools and universities using its AIMSweb 1.0 system. According to the Wall Street Journal, the data was not misused and does not include social security numbers or credit card information. Despite that, Pearson is offering complimentary credit monitoring services to affected students. Since only time will tell the true extent of the breach, it is a good idea to take advantage of the credit monitoring service if you or your kids were affected. If you are interested in learning more about this option, please call 866-883-3309 or email aimsweb1request@pearson.com.