where is content viewer?

i teach "interactivity with indesign" and for one unit we make apps using content viewer on both PCs and tablets to preview our work and i can't figure out how to do that in CC2015. help!

so far it seems that the best solution is to try to convince the two institutions where my classes are offered to keep cc2014 on the machines and this is on top of problems with getting content viewer installed to begin with... it isn't a standard install with server based licenses the techies say