How to Block Coolmath Games on Chrome (in ways that actually stick)

Coolmath Games is the school-computer classic precisely because the name lets everyone pretend it's educational. It isn't; it's a games portal with arithmetic in the branding, unblocked on school networks for two decades for that exact reason. If homework time keeps evaporating on a Chromebook, this is one of the usual suspects.

Option 1: Block Coolmath Games manually (free, but you hold the keys)

Chrome has no built-in "block this website" button for normal installs, so the manual route means editing your computer's hosts file: point the domain at 127.0.0.1 and the site stops resolving. It costs nothing and needs no software.

The site lives at coolmathgames.com with mirrors and 'unblocked' clones scattered across dozens of domains, which is why list-based blocking turns into whack-a-mole. AI evaluation catches the clones because they're the same content, whatever the domain.

The deeper problem is structural: any block you can set up in two minutes, you can undo in thirty seconds, and the moment you'll want to undo it is precisely the moment it exists for. Manual blocks are honor-system locks.

Option 2: A list-based blocker extension

Extensions like BlockSite or StayFocusd let you add the domain to a list, which beats the hosts file on convenience. Two weaknesses remain: the list is binary (the whole domain is blocked even when part of it is genuinely useful for your work), and the off switch is two clicks away in your extensions menu. List blockers stop the absent-minded visit; they rarely survive a motivated one.

Option 3: Block Coolmath Games with an AI that knows what you're working on

Focus AI works differently: you type what you're doing ("finish the calculus problem set"), pick a duration, and lock in. During the session, the AI reads every page you open against that task. Coolmath Games gets blocked when it doesn't serve the work, and the block page shows your own promise back to you, with an escape-attempt counter and a running tally of the time you've saved.

1. Install Focus AI from the Chrome Web Store (free, no account needed).
2. Type the task you're actually here to do and choose a session length.
3. Click Lock me in. Coolmath Games now hits a wall for exactly that long, and quitting early means typing your surrender letter by letter.

Two details matter for gaming sites specifically: the AI evaluates pages rather than domains, so the useful corners of the internet stay reachable while the feed does not. And every time you walk away from the block page, the win is stamped and timed: resisting Coolmath Games becomes a streak you can watch grow instead of a sacrifice you silently endure.

Blocking Coolmath Games on a Chromebook

On a personal Chromebook, Chrome extensions install exactly as on desktop, so the steps above work unchanged. On school-managed Chromebooks, extension installs are usually controlled by the administrator; if that's your situation, the realistic options are asking the admin or protecting the home computer where the actual homework happens.