Facilitating Communication about Measurement, Exponents, and Scientific Notation 
Part 1
First video on page
		
Video TranscriptStudent 1: "...miles per second, and I times it by
365 because that's how many days, and it would
be 67,890,000 and I divided it by 1 mile which
was 5280 feet and then I just got 12857."Student 2: "3.716E17..."Student 3 (off camera): "That's just three inches..."Student 2: "Let's see, there is 12 inches in a foot,
and in a mile there is 5280, so you multiply
those two and you get 3.716E17."Student 1: I took the miles per second; I
multiplied it by 365 days because that's how
many is in a year.  Then, when I got the answer,
I just divided it by 1 mile and I got 12857
inches."http://illuminations.nctm.org/reflections/912/Facilitating_Communication/part1.html