The Prof. McDoo CBT teaches you to get around the keyboard to the different screens in the MCDU.  It is pretty basic, not getting into the advanced stuff you will need at the oral. 

 

Prof. McDoo, PhD, on the other hand, is the study guide that takes you through the advanced concepts and preps you for all those questions you get on the oral.

 

We are now offering both in a "combo" pack.  Now, get the best of both worlds.  Better yet, you get over 20% off the price of both.