Teacher-Controlled Blocklist for Viral Game Sites: startup idea with real demand
A teacher is ready to go back to paper just to stop students playing Snow Rider 3D on school laptops. GoGuardian can't keep up with new mirror sites.
r/Teachers · Sep 14, 2026 – Oct 14, 2026 · 958 upvotes
So sick of Snow Rider 3D
Read the thread · 239 comments
Teacher-Controlled Blocklist for Viral Game Sites is a startup idea for teachers and schools. A teacher is ready to go back to paper just to stop students playing Snow Rider 3D on school laptops. GoGuardian can't keep up with new mirror sites. A thread in r/Teachers drew 958 upvotes and 239 comments between Sep 14, 2026 – Oct 14, 2026. People get by with GoGuardian, Securly, and District firewalls, and that still leaves this job open. Hotness is 3.85, Hot. Strong pain. Some willingness to pay. The thread drew 958 upvotes and 239 comments. Gaps in existing tools. A few weeks of work. A first version is a moderate amount of work, about 3–4 weeks, priced between $10 and $49 a month and charged as a free tier and a paid upgrade. The pain, the source, the alternatives, the scope notes, and the questions on this page are free to read and free to build from. The agent starter prompt is the paid part. The first slice is on the page. One credit unlocks the rest, to paste into a coding agent, download as Markdown, or send as a private link.
Verbatim quotes are added only after a manual check. Until then, the thread title is the excerpt. Exact post date and verbatim quotes pending enrichment.
Who has it
Teachers and schools.
What people use now
- GoGuardian
- Securly
- District firewalls
A way through
A lightweight tool the teacher turns on per lesson, with a fast community-updated blocklist of specific viral distraction sites, independent of central IT.
MVP scope
- Give teachers and schools a way to do this in one sitting: Teachers switch on a community-updated blocklist per class, without waiting on district IT.
- Persist the result and show it again after a reload.
- State the empty case when there is nothing to show yet, with one next step.
- Charge later with a free tier and a paid upgrade, between $10 and $49 a month. The free path must finish the core job once.
- Ship the browser extension only. Leave GoGuardian to keep the jobs they already do well.
How it could charge
Freemium · $10–49 a month · B2B · US.
Hotness 3.85
4 of 5, Hot. Strong pain. Some willingness to pay. The thread drew 958 upvotes and 239 comments. Gaps in existing tools. A few weeks of work.
Why this score
| Pain | 4 / 5 |
| Willingness to pay | 3 / 5 |
| Demand | 5 / 5 |
| Competition gap | 3 / 5 |
| Ease of build | 3 / 5 |
| Recency | 5 / 5 |
Weights: pain 25%, willingness to pay 20%, demand 20%, gap 15%, ease 10%, recency 10%. Recency is recomputed every build. The source report’s 1–10 score is not shown.
Questions
Is this idea already taken?
People already use GoGuardian, Securly, District firewalls. Those options do not do the job in the solution above. The idea is free to build. Nothing here is an exclusive claim.
How hard is a first version?
Moderate. A tight MVP is about 3 weeks (3–4 weeks), assuming the regulated or partner-gated parts are stubbed. The paid prompt turns that into tasks.
Who would pay, and how?
The audience is teachers and schools. Charge a free tier and a paid upgrade, and test a price between $10 and $49 a month. Willingness to pay is one input to Hotness, not a promise that someone will buy.
Can I use the evidence?
Yes. Build the product. The thread title is a short excerpt with a link, not a quote we are putting in someone's mouth. Exact post dates and verbatim lines are added only after a manual check. Ideas are suggestions, not medical, legal, or financial advice.
Agent prompt
The first slice is public. The rest is fetched only after you unlock it, and it is not in this page’s HTML.
# Agent starter prompt: Teacher-Controlled Blocklist for Viral Game Sites You are a senior product engineer. Build only the product described in this document. If a detail is missing, choose the smallest option and write it down in the README. Do not invent a second product, a marketplace of marketplaces, or a growth hack. ## Product Name: Teacher-Controlled Blocklist for Viral Game Sites One line: Teachers switch on a community-updated blocklist per class, without waiting on district IT. Shape: Browser extension AI stance: AI-assisted Region for v1: United States Hotness (context only, not a requirement): 3.85 (hot). Strong pain; some willingness to pay; thread engagement 958▲/239💬 (demand 5/5); gaps in existing tools; a few weeks of work. ## Problem A teacher is ready to go back to paper just to stop students playing Snow Rider 3D on school laptops. GoGuardian can't keep up with new mirror sites. Who feels it: Teachers and schools.
Unlock the rest with 1 credit.
If you want the operating plan rather than the build document, it lives on the sister site. See the free growth prompt
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