This looks ordinary, but if someone ask you to show how you count 1 to 10 with your fingers, how do you do?
If you never traveled to another country you will think people count same as you, but this is not true.
WWII had a notorious way to detect spy: by they way they count with the hands
In America is well-known we start with index finger and move to the middle and so one. The last finger raised is the thumb.
However in Japan the way is different. With the 5 fingers up, the first come down is thumb and they stay under to the others fingers, making a ✊ with the thumb under all
But this is not all. Americans in geral when go 5+ they use the two hands open showing all the fingers
However Chinese people adopt another way to count. The number 6 is the thumb and pink up, the 7 is all the fingers together. 8 is the thumb and index finger up and finally 9 is kind of hook you do with the index finger
In japan is also different: after 5 you need to add an extra fingers in your palm, like 7 will be your left hand open and you put 2 fingers from your right hand in your palm.
This small details can contribute for your students understand you better.
How about you: what is the way you count?