There are three levels of yoga described below with the suggested progression levels:
Talk to your teacher about knowing when to proceed on to the next level of classes. 

All yoga poses can be modified to suit your personal needs.

Beginning Classes: Developed for people new to yoga. Participants generally stay in beginner classes from 2 months to one year. Beginning yoga classes teach you the basics of yoga poses (called asanas), yoga breathing, and initial stress reduction.  Students generally see an increase in flexibility and strength in this level of yoga. It is
important to start with this level of yoga before proceeding to the next level.

Intermediate Classes: After learning the basics in beginning classes, yoga students progress into Intermediate classes. You will learn more challenging asana (poses), sun salutations, some inversions and more yoga breathing techniques. Students generally see an increase in strength, an increase in flexibility, and a decrease in perceived stress levels in this level. Some students remain in these classes for their entire yoga career and others move into advanced yoga classes.

Advanced Classes: Once your strength and flexibility have increased and you have learned how to safely practice the yoga asanas, you can move into advanced yoga (this generally happens 6 months to one year after beginning yoga). In this level of yoga you will practice challenging poses including higher level inversions, deeper twists and balances. You will learn the different sun salutations and more breathing techniques.

Vinyasa: In this style of yoga, postures or asanas are connected to one another by a flowing series of movements called vinyasa. The synchronization of movements with breath awakens the mind-body-soul connection establishing consistent states of balance, inner peace, and well-being. Different levels of vinyasa add more or less challenging poses in the flowing movements.

Power Yoga: Comes from the same origin as vinyasa yoga. Power classes hold poses and move from pose to pose to build heat. Expect to build strength in your body in this class.

Relaxation and Gentle classes: These classes are meant to move slowly to gently calm your body and mind. Poses are easy to modify and can be practiced by beginners and more advanced students alike.

Kundalini Yoga: This practice consists of breathwork, postures, movement, stretching and sound in a specific sequence for your body’s benefit. “Sets” are performed that each have a defined purpose and benefit for your body. Modifications are given so everyone can participate.