Often in the art lesson planning, there are lessons that allow the student to explore various drawing and painting media as the focus of the lesson.  The art student selects a still life object such as an apple.  Then she creates a still life study using all the art media the art class has to offer.  Art supplies which could be used are:  graphite pencils, colored pencils, pastels, oil pastels, charcoals, conte crayons, water-soluble colored pencils, markers, ink, watercolors, tempera and acrylic paints.  While creating each individual drawing or painting the student also works on showing tonal values (the lightness or darkness of an area of color.)