Loving this crazy method for doing multiplication. If you think about it, this is exactly what we do in the standard written form, this just shows it visually. (Which can be super for some kids - it may make a lot more sense.) I think it would be great to explain the standard methodology alongside this to see how they achieve the same result.

This video about the Fibonacci series and its relation to natural growth and proportion is both informative and enjoyable. I use these same proportions in my design work, and find them to always be pleasing to the eye.

via brainpickings