Geometry Cabinet


A wooden cabinet with six drawers; inside the drawers are insets (with knobs) and frames for the insets. 
  • Drawer 1: 6 circles which vary in diameter - from 10 cm to 5 cm
  • Drawer 2: 5 rectangles equal in length while decreasing in width by 1 cm consequently; 1 square
  • Drawer 3: 7 triangles - 3 isosceles > right-angled, acute-angled and obtuse-angled; 3 scalene > right-angled, acute-angled and obtuse-angled; 1 equilateral triangle 
  • Drawer 4: 6 polygons - pentagon, hexagon, heptagon, octagon, nonagon, decagon
  • Drawer 5: 4 curvilinear figures - curvilinear triangle, quatrefoil, oval, ellipse
  • Drawer 6: 4 quadrilaterals - rhombus, parallelogram, trapezoid, right-angled trapezoid
A demonstration tray with a square, circle and triangle. These are the basic geometric figures and are the figures you use in the first presentation of this material. 

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  • Visual Discrimination of Geometric Forms
  • Invite the child to the presentation.
  • Walk to the Geometry Cabinet. In the first presentation, work with the shapes in the demonstration tray - square, circle and triangle. 
  • Show the child how to carry the tray with two hands on either ends of the tray. Allow the child to choose a table to work. 
  • Sit on the right side of the child if you are right-handed.  
  • Pick up the shape in the far left side corner of the tray. Use your left hand thumb, index and middle fingers to hold the knob of the shape.  
  • Turn the shape upside down to face you. 
  • With your right hand index and middle fingers together, trace around the shape in a clockwise direction. Do this several times slowly and precisely. 
  • When you are finished tracing around the shape, place it on the table. 
  • Use your same fingers to trace around the shape's inset in the tray. Trace in a counterclockwise direction. Do this several times slowly and precisely. 
  • Place the shape back its inset. 
  • Repeat the with the rest of the shapes in the tray. 
  • When you are finished, return to the shelf in the same manner you retrieved it.