Good CVs for school project?

hello,

we are student from belgium and on our school we are doing a project on cataclysmic variables.

with our group we are going to use a telescope and at the end use the information to make a lightcurve of a cataclysmic variable.

our question is: wich are the best known cataclysmic variables and are active and visible these days.

thanks already for your help

vlaanderen