- MARNIE RITTER Marnie has been a teacher, lecturer, judge and designer of the art form known as Embroidery for over twenty years. Embroidery techniques advocated by her teaching skills encompass the areas of Silk, Metal Thread, Crewel Embroidery, Surface Stitches, Canvas Embroidery, Embroidery Embellishment and related techniques all combined to create pieces of needleart. Marnie's forte is to ...www.mritter.com