The information in this video is accurate, and correlates with other sources I researched. Somehow I was personally unaware of the 20 second requirement for washing to be effective.

 

I filmed my friend in college for her presentation for teaching children how to wash their hands. She used glitter as an example. Try to just use water and the glitter really doesn't come off. Add soap and it comes off drastically easier. And sing the ABCs to yourself (again, made for children). The ABCs song is long enough to do it and everyone knows it.

Mark Rober did a nicely instructional video on this too...