The school elected to enable TheftTrack to allow school district employees to secretly and remotely activate the standard webcam featured in all Apple laptops since 2006.[17][25][26][27] That allowed school officials to secretly take photographs through the webcam, of whatever was in front of it and in its line of sight, and send the photographs to the school's server.[9][17] The system took and sent a new photograph every 15 minutes when the laptop was on, and TheftTrack was activated, though school employees could adjust the timeframe to as low as one-minute intervals.[9][28][29] LANrev disabled the webcams for all other uses (e.g., students were unable to use Photo Booth or video chat), so most students mistakenly believed that their webcams did not work at all.[30]

https://en.wikipedia.org/wiki/Robbins_v._Lower_Merion_School_District