[svpk]

> Make 20 year experiments before rolling out any change at scale?

Basically. It wouldn't require a 20 year experiment probably. Looking at whole words vs phonics as an example, you'd get a handful of schools to participate and they'd try phonics in one class and whole word in the other. By the time the kids were in 2nd grade the fact that whole word learning wasn't working and that a higher rate of kids needed remedial lessons to catch up would have been obvious. And if it had worked really well you'd expect to see that performance improvement in reading by 2nd grade too!

So the experiment would take 3 years. Though then you'd probably want a larger scale experiment. I'd think if things were going well once kindergarten finished you could probably start involving more schools in the experimwnt the next year. So like 3-6 years altogether.

We have been successfully educating kids for a long time; if we want to mix things up with some fancy new pedagogy we should absolutely be studying if it actually works before rolling it out at scale!