This is the tricky part. These links don't last forever. Game developers anonymize their links to avoid getting reported. Here is how to find working links today.
Many "unblocked" sites mirror the official game files onto new URLs to bypass filters. While specific cloudfront.net links rotate frequently as they are discovered and blocked, these platforms often host the game: cloudfront.net unblocked games
Keep your volume low, close the tab when the teacher walks by, and never, ever install a "Required VPN extension" to play a CloudFront game (that is how you get a virus). This is the tricky part
A Virtual Private Network can hide your traffic from the firewall entirely. Unblocked Games GPlus - Sign in cloudfront.net unblocked games