We got this for my 8 year old on third grade now and we could not be any happier…
iPad Pro 10.5-inch 1st Gen 2017 A1701 (Wi-Fi).
We paid $349 (used, great condition) on ebay.
https://everymac.com/systems/apple/ipad/specs/apple-ipad-pro-10-5-inch-wi-fi-cellular-lte-specs.html
We also got a bluetooth wireless keyboard (no battery required) for $25.
Blackweb Attachable Protective Case and Smart Keyboard BWB18TA004 iPad Pro.
The only issue has been with the website [mathnasium.com]. Even tho the site supposed to run in chrome, it does not run on a iOS chrome browser.