Benefits:  The foundational pose for all standing poses, Tadasana teaches structural alignment of the spine and the related actions.  It creates a focus on posture while being a centering pose.

Stand with feet together.  If balance is an issue, the outsides of the feet can be up to hip width apart.  Press through the ball mounts of the toes and lift the toes to shift the weight back onto the heels.  Lowering the toes, press through the outer arches of the feet and the center of the heel.  The space between the second and third toe creates an imaginary line up the center of the leg.

Knees are over the ankles, hips are over the knees.  The adjustment of shins forward and thighs back may help to produce this alignment.

Lengthen the inner body with the breath and by lifting the floating ribs away from the pelvic rim. Reach through the crown of the head. If there is too much curve in the lower back (hyper lumbar lordosis), release the sacrum down and the tail bone toward the pubic bone.

Externally rotate upper arms to broaden the chest.  The shoulder blades should descend towards the waist and the sternum lift towards the chin.  Chin is parallel to the floor.  Internally rotate the forearms to broaden the back. 

Ears are over the shoulders.  Front and back of the neck are the same length.

Gaze softly in front of you. Relax the throat, separate the teeth slightly and move the tongue away from the roof of the mouth.