Understanding IIR , Low Pass, High Pass, Chebyshev, Elliptic Filter?
You did not posed any particular problems and asking for animations? I think that books are way better. We don't know what are your topics, but knowing you did all the studying and have two weeks so I suggest to:


Do the ELEC301x – Discrete Time Signals and Systems course from the Rice University. They do have a good part about design of digital filters, especially about differences between different topologies (including placement of zeros and poles), just watch.
Design few filters in MATLAB, do some filtering and try to understand their characteristics. fvtool is great, especially if you want to visualize anything you need.
Do the exams from past and if you feel confident then just go for a pint!
Read all the questions and answers on DSP SE regarding digital filters ;)


Yep, and after typing into google "digital filter applet" for example you can get: 
link1, link2, link3.