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The Detective Adjective Game

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Sixty-three triangles of light plastic: 
Seven types – as the triangles in the Geometry Cabinet:
Scalene acute-angle; isosceles acute-angle; scalene right-angle; isosceles right-angle; scalene obtuse-angle; isosceles obtuse-angle; equilateral. 
Three colors – red, blue, yellow. 
The box may be marked with the adjective symbol and a #3. 
The teacher’s writing tray.
Printed slips for independent work. 
The box of grammar symbols. 


  1. Invite the child to the lesson. 
  2. Show the child the detective adjective game box. 
  3. Ask the child to unroll two adjacent rugs on the floor. 
  4. Ask the child to bring the game box. 
  5. Help the child place all the triangles on the rugs. 
  6. “Do you know what a detective is? A detective is someone who uses clues to solve mysteries.” 
  7. Bring the writing tray to the table.  
  8. Write on paper “the triangle” 
  9. Cut it out and place it on the table. 
  10. Ask the child to read it. 
  11. “I think you know what to do.” 
  12. Wait for child to bring you a triangle. 
  13. “Oh this is a wonderful triangle! However, it is not the one I am thinking of. I’ll give you another clue.” 
  14. Narrow it down by picking a size. 
  15. Write the size on a piece of paper such as “large.” 
  16. Cut the word out of the paper and place it on the table with “the triangle.” 
  17. “The triangle large, does that make sense?” 
  18. Cut “the triangle” into two parts. 
  19. Ask the child to reorder it and read it: “the large triangle.”  
  20. “Let’s see if you bring the right one!” 
  21. “It is certainly a large triangle, but still not the one I had in mind. How about you put away all the triangles that are not large, and then I give you another clue.” 
  22. Repeat this process for color, angle, and type of sides. 
  23. One triangle should be left as the others were categorically eliminated.  
  24. “You got it!” 
  25. Ask the child to bring the grammar symbol box.  
  26. Ask the child to place the grammar symbols above the words. 
  27. Ask the child to transpose in multiple ways, asking each time if it makes sense.   
  28. Clean up. 
  29. Show the child the printed labels. 


Exercise is performed with a teacher, but an experienced child may fill in the role of the teacher and play with another child. 


Show the detective power of the adjective and how it’s is possible to single one object from a crowd with the help of adjectives.   




Printed slips are available for labeling triangles, some are slips can be combines, some are already combined. 
When child is using exercises like moveable alphabet, you can encourage and promote the use of adjectives. 
Extensive work with geometry cabinet is important as the child must be familiar with the various types of triangles.  

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