Mac vs EMB Plates & Unknown flow chart help

Hello everyone!
I am currently taking my first undergrad microbio class and am trying to build a master doc of different staining techniques, media, and biochemical tests. My question is on when to use a Mac vs EMB plate as my understanding is they are both selective for gram-neg and differentiate lactose fermenting. I am also about to begin my first unknown project and would like to know if anyone has any good resource on building a flow chart or one that someone else has already built. Any recommendations for lab are welcome and encouraged. Thank you so much!