[secabeen]

Even if you build a decent clone, it will be hard to break the monopoly due to one key feature: reliable factory reset. Teachers will require a device that can be reliably reset of all user data to prevent cheating. If the student can hide or mask the factory reset, it will never be approved for testing, and thus will never be approved for classroom use.

[nullc]

https://www.google.com/search?q=ti+calculator+fake+factory+r...

Sounds like the actual requirement is to only be secure against people who never think to try.

[Sir_Cmpwn]

I think I would explain that it's a placebo and instead suggest verbally banning students from using their calculators for evil, then discipline them when they do so.