Montessori Montessori: Shape Work offers readers die-cut shapes to trace with their fingers, grouped by family and illustrated into a familiar object for relevancy. Featured shapes: 3 triangles (equilateral, isosceles, right); 3 rounds (circle, oval, ellipse); 3 parallelograms (square, rectangle, rhombus); 3 polygons (pentagon, hexagon, octagon). Full description