A pupil hacked into their teacher's computer to change grades after finding the password on a note stuck to a laptop. The same password was used for access to multiple accounts and the pupil's hack is among the incidents which prompted GCHQ to offer cyber security training to school staff. After obtaining the password, the pupil was able to access more than 20,000 records and change their grades, GCHQ's National Cyber Security Centre says. The incident, which resulted in disciplinary action for the school by the Information Commissioner's Office, is used as one of four real-life case studies given as part of the Government's new training programme.