The rule of thirds is a rule used by artists and photographers in relation to composition. How does it work? Divide your paper into thirds as shown and place your subject in the area of the one of the circles indicated below:
Life drawing is drawing (or sometimes painting) of the human figure from a live model. Sometimes the model is clothed or semi-clothed but the idea is that you can observe the human form in its ‘life’ or natural form.
Drawing clothed models is very useful of course because you can get to observe the folds and creases of the clothing. Life drawing has the advantage of seeing the anatomy as it is and sometimes to understand how clothing behaves in the way it falls and creases we have to understand what is underneath, the anatomy.