Hidden Harms: The Misleading Promise of Monitoring Students Online
- Document
- 1 August 2022
- Event
- 1 August 2022
- Retrieved
- 16 September 2026
The classroom note
A high school issues a laptop to every student and, like most districts that do, installs software that can log logins, flag search terms and see what is on a student's screen. The pitch to a family is safety: the software will catch a crisis before it happens. The Center for Democracy and Technology's research on student activity monitoring asks a narrower, checkable question: what is the software actually used for once installed, and who does that use fall on?
What the evidence says
Hidden Harms, CDT's August 2022 report, is built on nationally representative surveys of 1,606 parents of grade 6-12 students, 1,008 teachers of grades 6-10, and two student samples of 400 and 460 in grades 9-12, fielded in May and June 2022, self-reported and not verified against school records. Teachers report monitoring is used for discipline more often than for identifying safety threats, and the survey finds LGBTQ+ students disproportionately reporting discipline or law-enforcement contact traced to flagged activity, alongside schools sending flagged data to police. An earlier, differently designed CDT study, Online and Observed, published September 2021, used interviews with nine administrators across five districts rather than a survey, and reports 71 percent of teachers said their district monitored school-issued devices, against 16 percent for personal devices, a gap administrators linked to the security benefits of a uniform, district-managed device fleet.
The implementation question
The mechanism is who reads the alert. Monitoring software generates flags; a teacher or counsellor, usually without dedicated training in doing this privately or securely, decides what a flagged search or message means and what happens next. Hidden Harms reports that training on this task is uneven, converting a technical alert into a judgement call made under time pressure by staff who did not choose the software and cannot see its false-positive rate. Higher-poverty districts, which rely more heavily on school-issued devices, subject more of their students to that judgement call than districts where more students use personal devices instead.
What holds and what fails
Monitoring plausibly holds where a district can show flags are reviewed by trained staff, limited to school hours and purposes, and not routinely forwarded to police. It fails, on this evidence, wherever discipline is the default response to a flag, oversight of who sees flagged content is unclear, or the software runs outside school hours on a device a student cannot decline to use. Editorially, safety software is a marketing description; the surveys measure what the software is used for in practice, and that is a different, checkable claim.
- Does the district know, and will it disclose, how often monitoring flags lead to discipline rather than a safety referral?
- Who reviews a flag, what training have they had, and can a family ask what was seen?
- Is monitoring switched off outside school hours, or does it follow the device home?
Two studies with different designs point the same direction: a tool built to protect students can also be the mechanism that disciplines them, and a family cannot tell which is happening from a vendor's pitch alone.
Sources & reading trail
Survey of parents, teachers and students (fielded May/June 2022) on monitoring purposes, discipline, law-enforcement contact and LGBTQ+ disparities.
Source published: 1 August 2022 · Retrieved: 16 September 2026
Qualitative interviews with nine administrators across five LEAs; reports the 71%-vs-16% school-issued/personal device monitoring gap.
Source published: 1 September 2021 · Retrieved: 16 September 2026
Departments, studies and vendor documents establish the record; the implementation reading and the boundary are School AI Atlas editorial analysis. This retrospective draft does not imply the site published on the event date.