*This is the paid, watermark-free version - a free version (with watermarks) is available in my store to consult* Waves are really easy to teach if all we do is show equations to students and tell them what each variable within a given equation represents. The DERIVATIONS, however, are anything but easy. The textbook typically used in Ontario SPH4U courses does a mediocre job (at best) explaining how the equations came to be. Fear not: the slideshow here not only gives you and your students a fu