This tutorial covers the theory of the pentatonic scales, both major & minor.  All five box patterns, why they have their shapes, how they are interconnected across the entire fretboard.  

https://www.guitartricks.com/tutorial/296/

These tutorials cover technical exercises on systematically practicing all 5 shapes.

Minor Pentatonic Exercises
https://www.guitartricks.com/tutorial/185

Major PentatonicExercises
https://www.guitartricks.com/tutorial/722

These tutorials cover practical ways to connect them to make music.

https://www.guitartricks.com/tutorial/737/

https://www.guitartricks.com/tutorial/843/

https://www.guitartricks.com/tutorial/914/

https://www.guitartricks.com/tutorial/1277/

I also have many tutorials covering how to use pentatonic to play specific blues & rock style licks.

Hope that helps!