I am uncertain of the utility of any mandated screen based technology or app in K-8 education. We keep investing in it and the standard scores keep falling. Teachers are often juggling multiple apps and now have an IT job on top of their work. None of the efficiency or adaptive promises are coming to fruition. Teachers have less time and more stress.

Something is broken. Lets go back to paper and pencil.

Duolingo was incredible to get my kids engaged with chess past USCF 1000

It also was super helpful in maintenance of a 3rd language spoken at home.

Maybe that's where the problem is. Perhaps it should be a requirement that an app must be winner in the consumer education market before it can be sold to the education bureacracy. If an app survived the cutthroat education app B2C market, you know it works well for B2E market