Plate squats
 

For technique not for using huge loads at all:

http://www.precisionnutrition.com/wo...ate-squat.jpeg


Plate squats encourage upright posture and appropriate load distribution. Hold the plate parallel to the ground. If the plate tilts downwards, you’re probably rounding your back.

To be a real hardass, try balancing a ball on top of the plate, as shown in the photo below.

Use a light plate.

from: Precision Nutrition Coaching | All About The Squat

Interesting variation. Might try this with my teens using 5 pounds.
Thanks Babs.

That's a DEEEEEEEP squat!!!

I will have to try that one.