The purpose and result of classical Yoga is the ability to enter the state of unwavering focus on the witnessed consciousness of the true Self.  Meditation techniques prepare us for this unitive state. 
 
Mana eva manusyanam karanam bandha moksayoho.
"As the mind, so the person; bondage or liberation is in your own mind."
 
10 hours Level
Begins with introduction to Meditation, including techniques to support maintaining a seated posture for extended practices
Guided meditation practices 
Introduction to techniques of non-attachment, including sense removal (pratyahara) and object-contemplation (savitarka samadhi) 
10 total hours of instruction, plus at home practice
 
20 hours Level
Begins after 10 hours level is complete,
Consists of short independent practices and moderate-to-lengthy guided practices
Introduces variagyam (non-attachment), and subtle element contemplation (savicara samadhi)
10 total hours of instruction, plus at home practice
 
30 hours Level
Begins after 20 hours level is complete,
Consists of moderate-length independent practices and extended guided practices
Introduces contemplation of the mind itself (sa-ananda samadhi) and Hridaya meditation
Begin instruction of meditation 
10 total hours of instruction, plus at home practice
 
40 hours Level
Begins after 30 hours level is complete,
Introduces sustained long-form meditation sessions, and contemplation of being (sa-asmita samadhi)
Focuses on meditation teaching praxis 
10 total hours of instruction, plus at home practice