D.C.
My child's teacher recommended the website SumDog for my child. She said that it's a great way for kids to practice while still being fun. She said it helps them move away from using fingers, because they want to try to be fast to score more points in the games. My son loves it.
As for how typical this is - I think that still using finger to count is common, but not ideal, and teachers work hard trying to move students away from it at this age.