Separating Gloom expansions

Is there an easy way to separate the Gloom expansions from the main deck? I've had problems where I want to teach new players how to play the basic game and noticed that it's very difficult to sort out the "advanced" cards in the expansions. Thanks for the help!

Card lists are on the individual product pages. You can find them by clicking the cover images in the left bar at atlas-games.com/gloom