Hi,
I was just contemplating of putting together a notebook with similar content, so this was a good review. A little bit simplistic for my taste, but very neat.
For encouraging students to use Mathematica (if I understood the purpose of this notebook correctly), would suggest to include the actual Mathematica code used and perhaps some examples how to solve some simple problems.
Also it would be extremely enlightening for students to see where Mathematica is useful to also include the derivations of the formulas and how Mathematica can be used to verify those derivations.
Just showing a notebook where everything is done already (with just a simple Manipulate[] content) doesn't really convey how Mathematica would be useful for anything related to studies - students will just think "neat, but I can do the same in PowerPoint" (assuming they don't have any idea about Mathematica in the first place).