The attorney general of New Mexico believes otherwise: https://www.theverge.com/2020/2/20/21145698/google-student-p... (Actually two separate ongoing cases are discussed here.)

Here's another suit from Illinois, both regarding COPPA and the Illinois BIPA: https://www.cnet.com/news/two-children-sue-google-for-allege...

There's more, mind you, but suffice to say, every school who is using the Classroom platform is going to be dealing with a lot of angry parents soon.