By second grade, most kids have a good idea of the different denominations of coins, and they’re well on their way to being able to count money accurately. Practice makes perfect, though, so it’s wise to give them practice opportunities as much as possible.
One fun activity is to make your own money by doing crayon rubbings of coins, and drawing the faces and markings onto similarly shaped dollar bills. Then kids can cut them out and you’ve got an easy playtime activity that works well in a homeschool environment to reinforce key concepts about recognizing and counting money. It’s also fun to set up a storefront with homemade items the kids have designed and manufactured themselves and let them role-play to pretend buying, selling, and counting money or making change.
Another homeschool-friendly way to reinforce these concepts is by letting the kids clip coupons, either to use in their pretend store, or for you to use during your next shopping trip. It’s important for kids to not just learn the abstract concept of money and which coins are which denominations, but for them to pair that knowledge with the ability to use the skills in real life situations. So let them help with the grocery budget, clip coupons, and develop the common-sense ability to USE money too.