> They should have learned that by age 4, which is why kids start pre-k/k at the 4/5 age range.

Lol. Because you think they should? Love the one-size fits all statement - not.

As soon as someone has 2+ kids, they realize how ludicrous that statement is. Better yet go talk to a kindergarten teacher - I don't know how they handle kids that age that are not even theirs