Observational Drawing In Room 10

We've started a rountine of doing a 10 minute observational drawing once a week.  First we choose an interesting object to draw, like a piece of fruit or your hand, and look hard at lines and shade you see.  Then we do a 10 second continuous line - blind drawing, a 30 second blind drawing and then a 2 minute line and shade drawing.  The rule of thumb is to only make lines on your page when you are looking at the object.  You can look down, but only to see where your pencil is.