Refuse. They can't force you to use it. If they want you to use discord, say you only use matrix. If they want you to use chromeos, say you only use GNU/Linux
No? It's not their hardware and even if it was they can't force you to use that hardware. I'm not sure about the laws around it but I do know schools can't force you to agree to contracts (such as EULAs)
Maybe times have changed but when I was in school a decade ago they would just say I don't care and punish you for not doing your work lol, they can absolutely make you use it by virtue of being in charge
Schools sign the contracts themselves for license deals. The program either doesn't collect the same data, or doesn't collect anything other than analytics.
They do this in Enterprise too. All of our enterprise software is a special version made for distribution. No EULA is involved.
LOL, maybe in a competent school system. Meanwhile, in my kids' school system even things like signing up to pay for school lunches is outsourced to some shitty third-party service with an outrageous ToS that includes a binding arbitration clause with said arbitration being conducted in Louisiana (a different state hundreds of miles away).