So, some kids at Church showed me this math game that their public school lets them play. They were playing it for fun on a Saturday night
https://www.prodigygame.com/
I signed DD up, and it seems pretty good so far.
(My one misgiving is the "Wizard" theme - I worry I'll run into some non-Christian content. I'd love to see other themes)
But, anyway, I'm reading up on the company and it is fascinating:
https://mobilesyrup.com/2018/01/18/burlington-educational-game-prodigy-24-million-players/
Check it out for your DC or DGC (or even for yourself, if you're a gamer - it goes up to 8th grade - and who couldn't use some brushing up?
)