a little lesson in place value

Teaching place value to second and third graders is no easy task. To understand that a “one” has a different value depending on the value of it’s position, well, that just takes a bit of time and practice to wrap one’s 8 year old brain around. Or, one’s 50 year old brain, or 27, or 75 year old brain. Because one is just one, right?  No, not when it stands in the hundreds place.  Then it’s one hundred.  Or whenRead more