TL1 - Lesson 12: Letter Exit No. 2 --> THROAT (Al Khalq)

Diagram: 

Halkiya - Upper Throat

Halkiya - Middle Throat

 Halkiya - Lower Throat

Practice:

Try to read the Halkiya letters when it is sakina and with the 3 movement signs.

(I know the table is not straight so for OCD out there, bear with me ;P)

You can then try to pick Halkiya letters (given actually, just find the words) from any surah and specify the exit.