Hit the companies where it hurts - their pockets
I remember ID Card And You warning years go that these companies would use biometrics in schools to groom children. I find it sickening and have already notified my childrens schools that under no circumstances are they to take biometrics from my children without my concent.
If you are opposed to biometrics in schools I suggest you boycott the products of companies profiting from it. The site http://www.biometricfreedom.com is very useful for this.
Together parents can stop this sick technology.