Geogebra and Desmos Tutorials

Geogebra tutorials: http://mathandmultimedia.com/geogebra/


Desmos tutorials: http://reasonandwonder.com/learn-desmos/

Difference of Two Squares on Geogebra and Snap Cubes

Mathhombre with Geogebra:

http://mathhombre.tumblr.com/post/101931456149/difference-of-squares-inspired-by-mike-lawler



Matt Lawler with Snap Cubes:

https://mikesmathpage.wordpress.com/2014/11/05/studying-the-difference-of-squares-with-snap-cubes/