I wish I had seen this video when I was editing the Physical Science Module 1 post!
It is added to that post now, but I'm posting it here for those that may have missed it. Or still need a bit more clarity on the Factor/Label method, or need a bit of review, or are just curious about this awesomely simple, but so logical video! =)
A bit loud, so you may want to turn it down. =)