When teaching, I love to face my students so that they may mirror my motions. This allows me to keep my eyes open for mistakes or needed adjustments.
When a student requires an adjustment or correction, it is helpful to show them what they are doing incorrectly. For example, students have a tendency to roll their knees in when seated in a second position straddle on the floor. When this happens, show them the turned in position and correct it to the turned out position. The visual of seeing correct versus incorrect is very helpful for their self-awareness.
This technique works well with a variety of ages and levels. Plus, it is a teaching tool that focuses on collaboration and intrinsic retention on behalf of the student- this will lead to longer lasting results!