When I visited London in the late 90s, which, by the way, seems like a lifetime away, I learned a phrase they use on the subway (or underground) every time doors open and people get on and off. The recording says, “Mind the gap!”
The gap refers to the hole between the platform and the inside of the train. It’s a small gap, but nevertheless people can get caught in it if they step a certain way, or if not people, their rolling luggage or a pet or whatever is dragging behind them on the floor.
I will have to ask my friends who live in London if they still say that on the underground. It’s very catchy, especially if you hear that seven times in the morning and seven times at night on your daily commute. I suppose one blocks it out after awhile.
When I recently read about the homeschool math gap, I remembered the London underground. But then I came back to my homeschool reality. This is some serious research and some good information to have, my dear homeschooling friends.